<?xml version="1.0" encoding="US-ASCII"?>
<!-- RR Donnelley Xcelerate Taxonomy Labels Linkbase, based on XBRL 2.1  http://www.rrdonnelley.com/ -->
<!-- Version: 6.23.6 -->
<!-- Round: 3 -->
<!-- Creation date: 2016-07-29T19:52:20Z -->
<!-- Copyright (c) 2005-2013 R.R. Donnelley &amp; Sons Company All Rights Reserved. -->
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_lbl" xml:lang="en-US" id="id_10699837_2027238_5_1">Balance at beginning of period</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_lbl" xml:lang="en-US" id="id_10699837_2024207_2_1">Accumulated Other Comprehensive Income (Loss) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xml:lang="en-US" id="id_10699837_2027676_1_1">AOCI Attributable to Parent [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xml:lang="en-US" id="id_10699837_2027676_2_1">Accumulated Other Comprehensive Loss [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ActualRemediationFieldworkPeriod" xlink:label="aa_ActualRemediationFieldworkPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ActualRemediationFieldworkPeriod_lbl" xml:lang="en-US" id="id_10699837_2188345_3_1">Actual remediation fieldwork period.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ActualRemediationFieldworkPeriod_lbl" xml:lang="en-US" id="id_10699837_2188345_1_1">Actual Remediation Fieldwork Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ActualRemediationFieldworkPeriod_lbl" xml:lang="en-US" id="id_10699837_2188345_2_1">Actual remediation fieldwork period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ActualRemediationFieldworkPeriod" xlink:to="aa_ActualRemediationFieldworkPeriod_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AdditionalChargeRelatedToEuropeanCommissionAnnouncement" xlink:label="aa_AdditionalChargeRelatedToEuropeanCommissionAnnouncement"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AdditionalChargeRelatedToEuropeanCommissionAnnouncement_lbl" xml:lang="en-US" id="id_10699837_2358203_3_1">Additional charge related to European commission announcement.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AdditionalChargeRelatedToEuropeanCommissionAnnouncement_lbl" xml:lang="en-US" id="id_10699837_2358203_1_1">Additional Charge Related To European Commission Announcement</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AdditionalChargeRelatedToEuropeanCommissionAnnouncement_lbl" xml:lang="en-US" id="id_10699837_2358203_2_1">Partial reserve</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AdditionalChargeRelatedToEuropeanCommissionAnnouncement" xlink:to="aa_AdditionalChargeRelatedToEuropeanCommissionAnnouncement_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US" id="id_10699837_2026591_1_1">Additional Paid in Capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US" id="id_10699837_2026591_2_1">Additional capital</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapital" xlink:to="us-gaap_AdditionalPaidInCapital_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="us-gaap_AdditionalPaidInCapitalMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xml:lang="en-US" id="id_10699837_2025075_1_1">Additional Paid-in Capital [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xml:lang="en-US" id="id_10699837_2025075_2_1">Additional Capital [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalMember" xlink:to="us-gaap_AdditionalPaidInCapitalMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xml:lang="en-US" id="id_10699837_2022912_1_1">Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xml:lang="en-US" id="id_10699837_2022912_2_1">Stock-based compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US" id="id_10699837_2023126_1_1">Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US" id="id_10699837_2023126_2_1">Adjustments to reconcile net income to cash from operations:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AlcoaAluminioMember" xlink:label="aa_AlcoaAluminioMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AlcoaAluminioMember_lbl" xml:lang="en-US" id="id_10699837_2208804_3_1">Alcoa Aluminio [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AlcoaAluminioMember_lbl" xml:lang="en-US" id="id_10699837_2208804_1_1">Alcoa Aluminio [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AlcoaAluminioMember_lbl" xml:lang="en-US" id="id_10699837_2208804_2_1">Alcoa Aluminio [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AlcoaAluminioMember" xlink:to="aa_AlcoaAluminioMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AlcoaJointVentureMember" xlink:label="aa_AlcoaJointVentureMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AlcoaJointVentureMember_lbl" xml:lang="en-US" id="id_10699837_2168293_3_1">Alcoa joint venture.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AlcoaJointVentureMember_lbl" xml:lang="en-US" id="id_10699837_2168293_1_1">Alcoa Joint Venture [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AlcoaJointVentureMember_lbl" xml:lang="en-US" id="id_10699837_2168293_2_1">Alcoa Joint Venture [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AlcoaJointVentureMember" xlink:to="aa_AlcoaJointVentureMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AlcoaOfAustraliaLimitedMember" xlink:label="aa_AlcoaOfAustraliaLimitedMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AlcoaOfAustraliaLimitedMember_lbl" xml:lang="en-US" id="id_10699837_2354986_3_1">Alcoa Of Australia Limited [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AlcoaOfAustraliaLimitedMember_lbl" xml:lang="en-US" id="id_10699837_2354986_1_1">Alcoa Of Australia Limited [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AlcoaOfAustraliaLimitedMember_lbl" xml:lang="en-US" id="id_10699837_2354986_2_1">AofA [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AlcoaOfAustraliaLimitedMember" xlink:to="aa_AlcoaOfAustraliaLimitedMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AlcoaTrasformazioniMember" xlink:label="aa_AlcoaTrasformazioniMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AlcoaTrasformazioniMember_lbl" xml:lang="en-US" id="id_10699837_2275668_3_1">Alcoa Trasformazioni.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AlcoaTrasformazioniMember_lbl" xml:lang="en-US" id="id_10699837_2275668_1_1">Alcoa Trasformazioni [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AlcoaTrasformazioniMember_lbl" xml:lang="en-US" id="id_10699837_2275668_2_1">Alcoa Trasformazioni [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AlcoaTrasformazioniMember" xlink:to="aa_AlcoaTrasformazioniMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AlcoaWorldAluminaAndChemicalsMember" xlink:label="aa_AlcoaWorldAluminaAndChemicalsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AlcoaWorldAluminaAndChemicalsMember_lbl" xml:lang="en-US" id="id_10699837_2068696_3_1">Alcoa World Alumina and Chemicals.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AlcoaWorldAluminaAndChemicalsMember_lbl" xml:lang="en-US" id="id_10699837_2068696_1_1">Alcoa World Alumina And Chemicals [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AlcoaWorldAluminaAndChemicalsMember_lbl" xml:lang="en-US" id="id_10699837_2068696_2_1">AWAC [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AlcoaWorldAluminaAndChemicalsMember" xlink:to="aa_AlcoaWorldAluminaAndChemicalsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AlcoaWorldAluminaBrasilMember" xlink:label="aa_AlcoaWorldAluminaBrasilMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AlcoaWorldAluminaBrasilMember_lbl" xml:lang="en-US" id="id_10699837_2074938_3_1">Alcoa World Alumina Brasil.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AlcoaWorldAluminaBrasilMember_lbl" xml:lang="en-US" id="id_10699837_2074938_1_1">Alcoa World Alumina Brasil [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AlcoaWorldAluminaBrasilMember_lbl" xml:lang="en-US" id="id_10699837_2074938_2_1">Alcoa World Alumina Brasil [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AlcoaWorldAluminaBrasilMember" xlink:to="aa_AlcoaWorldAluminaBrasilMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xml:lang="en-US" id="id_10699837_2024866_1_1">Allowance for Doubtful Accounts Receivable, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xml:lang="en-US" id="id_10699837_2024866_2_1">Receivables from customers, allowance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:to="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AluminaLimitedMember" xlink:label="aa_AluminaLimitedMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AluminaLimitedMember_lbl" xml:lang="en-US" id="id_10699837_2200476_3_1">Alumina Limited.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AluminaLimitedMember_lbl" xml:lang="en-US" id="id_10699837_2200476_1_1">Alumina Limited [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AluminaLimitedMember_lbl" xml:lang="en-US" id="id_10699837_2200476_2_1">Alumina Limited [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AluminaLimitedMember" xlink:to="aa_AluminaLimitedMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AluminaLimitedOfAustraliaMember" xlink:label="aa_AluminaLimitedOfAustraliaMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AluminaLimitedOfAustraliaMember_lbl" xml:lang="en-US" id="id_10699837_2392027_3_1">Alumina limited of Australia.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AluminaLimitedOfAustraliaMember_lbl" xml:lang="en-US" id="id_10699837_2392027_1_1">Alumina Limited of Australia [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AluminaLimitedOfAustraliaMember_lbl" xml:lang="en-US" id="id_10699837_2392027_2_1">Alumina Limited of Australia [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AluminaLimitedOfAustraliaMember" xlink:to="aa_AluminaLimitedOfAustraliaMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AluminaMember" xlink:label="aa_AluminaMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AluminaMember_lbl" xml:lang="en-US" id="id_10699837_2068900_3_1">Alumina.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AluminaMember_lbl" xml:lang="en-US" id="id_10699837_2068900_1_1">Alumina [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AluminaMember_lbl" xml:lang="en-US" id="id_10699837_2068900_2_1">Alumina [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AluminaMember" xlink:to="aa_AluminaMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AluminumContractsMember" xlink:label="aa_AluminumContractsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AluminumContractsMember_lbl" xml:lang="en-US" id="id_10699837_2367509_3_1">Aluminum contracts.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AluminumContractsMember_lbl" xml:lang="en-US" id="id_10699837_2367509_1_1">Aluminum Contracts [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AluminumContractsMember_lbl" xml:lang="en-US" id="id_10699837_2367509_2_1">Aluminum Contracts [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AluminumContractsMember" xlink:to="aa_AluminumContractsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AluminumFuturesDesignatedAsFairValueHedgesInKiloMetricTon" xlink:label="aa_AluminumFuturesDesignatedAsFairValueHedgesInKiloMetricTon"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AluminumFuturesDesignatedAsFairValueHedgesInKiloMetricTon_lbl" xml:lang="en-US" id="id_10699837_2364483_3_1">Aluminum futures designated as fair value hedges in kilo metric ton.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AluminumFuturesDesignatedAsFairValueHedgesInKiloMetricTon_lbl" xml:lang="en-US" id="id_10699837_2364483_1_1">Aluminum Futures Designated As Fair Value Hedges In Kilo Metric Ton</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AluminumFuturesDesignatedAsFairValueHedgesInKiloMetricTon_lbl" xml:lang="en-US" id="id_10699837_2364483_2_1">Aluminum forecast sales</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AluminumFuturesDesignatedAsFairValueHedgesInKiloMetricTon" xlink:to="aa_AluminumFuturesDesignatedAsFairValueHedgesInKiloMetricTon_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_AluminumSoldInMetricTonPerMonthByFacility" xlink:label="aa_AluminumSoldInMetricTonPerMonthByFacility"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AluminumSoldInMetricTonPerMonthByFacility_lbl" xml:lang="en-US" id="id_10699837_2169301_3_1">Aluminum sold in metric ton per month by facility.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AluminumSoldInMetricTonPerMonthByFacility_lbl" xml:lang="en-US" id="id_10699837_2169301_1_1">Aluminum Sold In Metric Ton Per Month By Facility</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AluminumSoldInMetricTonPerMonthByFacility" xlink:to="aa_AluminumSoldInMetricTonPerMonthByFacility_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ArconicIncMember_lbl" xml:lang="en-US" id="id_10699837_2392068_3_1">Arconic Inc [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ArconicIncMember_lbl" xml:lang="en-US" id="id_10699837_2392068_1_1">Arconic Inc [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ArconicIncMember_lbl" xml:lang="en-US" id="id_10699837_2392068_2_1">Arconic Inc [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AssetImpairmentAndAcceleratedDepreciationMember_lbl" xml:lang="en-US" id="id_10699837_2091586_3_1">Asset impairment and accelerated depreciation.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRetirementObligationCostsMember_lbl" xml:lang="en-US" id="id_10699837_2022268_1_1">Asset Retirement Obligation Costs [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US" id="id_10699837_2023136_6_1">Total assets</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US" id="id_10699837_2027910_2_1">ASSETS</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AvailableForSaleSecurities_lbl" xml:lang="en-US" id="id_10699837_2027259_2_1">Available-for-sale securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleSecurities" xlink:to="us-gaap_AvailableForSaleSecurities_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AvailableForSaleSecuritiesAbstract_lbl" xml:lang="en-US" id="id_10699837_2027042_1_1">Available-for-sale Securities [Abstract]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AvailableForSaleSecuritiesAbstract" xlink:to="us-gaap_AvailableForSaleSecuritiesAbstract_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AveragePercentageOfCreditSpread_lbl" xml:lang="en-US" id="id_10699837_2255469_1_1">Average Percentage Of Credit Spread</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AveragePercentageOfCreditSpread" xlink:to="aa_AveragePercentageOfCreditSpread_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_AveragePriceMember_lbl" xml:lang="en-US" id="id_10699837_2140635_3_1">Average Price [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_AveragePriceMember_lbl" xml:lang="en-US" id="id_10699837_2140635_1_1">Average Price [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_AveragePriceMember_lbl" xml:lang="en-US" id="id_10699837_2140635_2_1">Average Price [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_AveragePriceMember" xlink:to="aa_AveragePriceMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_BaieComeauSmelterMember" xlink:label="aa_BaieComeauSmelterMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_BaieComeauSmelterMember_lbl" xml:lang="en-US" id="id_10699837_2280566_3_1">Baie Comeau Smelter [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_BaieComeauSmelterMember_lbl" xml:lang="en-US" id="id_10699837_2280566_1_1">Baie Comeau Smelter [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_BaieComeauSmelterMember_lbl" xml:lang="en-US" id="id_10699837_2280566_2_1">Baie Comeau Smelter [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionLineItems_lbl" xml:lang="en-US" id="id_10699837_2022284_1_1">Business Acquisition [Line Items]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_lbl" xml:lang="en-US" id="id_10699837_2023816_1_1">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_lbl" xml:lang="en-US" id="id_10699837_2023816_2_1">Increase (decrease) intangible assets</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory" xlink:label="us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory_lbl" xml:lang="en-US" id="id_10699837_2022517_1_1">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory_lbl" xml:lang="en-US" id="id_10699837_2022517_14_1">Decrease in inventories</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment" xlink:label="us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_10699837_2026411_1_1">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_10699837_2026411_14_1">Decrease in properties, plants, and equipment</label>
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    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAdditionalPaidInCapital" xlink:label="aa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAdditionalPaidInCapital"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAdditionalPaidInCapital_lbl" xml:lang="en-US" id="id_10699837_2369758_3_1">Business combination, recognized identifiable assets acquired and liabilities assumed, additional paid in capital.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAdditionalPaidInCapital_lbl" xml:lang="en-US" id="id_10699837_2369758_1_1">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Additional Paid In Capital</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_lbl" xml:lang="en-US" id="id_10699837_2025988_1_1">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContingentLiability_lbl" xml:lang="en-US" id="id_10699837_2027278_2_1">Contingent payment related to an acquisition</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_lbl" xml:lang="en-US" id="id_10699837_2024237_1_1">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_lbl" xml:lang="en-US" id="id_10699837_2024237_2_1">Total liabilities</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="us-gaap_BusinessCombinationsAbstract"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalizationLongtermDebtAndEquity_lbl" xml:lang="en-US" id="id_10699837_2023162_1_1">Capitalization, Long-term Debt and Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CapitalizationLongtermDebtAndEquity_lbl" xml:lang="en-US" id="id_10699837_2023162_2_1">Project financing Investment</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_CommercialPaperFairValueDisclosure_lbl" xml:lang="en-US" id="id_10699837_2312089_3_1">Commercial Paper Fair Value Disclosure</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ComprehensiveIncomeNoteTextBlock" xlink:label="us-gaap_ComprehensiveIncomeNoteTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ComprehensiveIncomeNoteTextBlock_lbl" xml:lang="en-US" id="id_10699837_2024494_1_1">Comprehensive Income (Loss) Note [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ComprehensiveIncomeNoteTextBlock_lbl" xml:lang="en-US" id="id_10699837_2024494_2_1">Accumulated Other Comprehensive Loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNoteTextBlock" xlink:to="us-gaap_ComprehensiveIncomeNoteTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="us-gaap_ConsolidationItemsAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConsolidationItemsAxis_lbl" xml:lang="en-US" id="id_10699837_2022117_1_1">Consolidation Items [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ConsolidationItemsAxis_lbl" xml:lang="en-US" id="id_10699837_2022117_2_1">Consolidation Items [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConsolidationItemsAxis" xlink:to="us-gaap_ConsolidationItemsAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="us-gaap_ConsolidationItemsDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConsolidationItemsDomain_lbl" xml:lang="en-US" id="id_10699837_2027981_1_1">Consolidation Items [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ConsolidationItemsDomain_lbl" xml:lang="en-US" id="id_10699837_2027981_2_1">Consolidation Items [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConsolidationItemsDomain" xlink:to="us-gaap_ConsolidationItemsDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ConsumerPriceIndexBaseYear" xlink:label="aa_ConsumerPriceIndexBaseYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ConsumerPriceIndexBaseYear_lbl" xml:lang="en-US" id="id_10699837_2117018_3_1">Consumer price index base year.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ConsumerPriceIndexBaseYear_lbl" xml:lang="en-US" id="id_10699837_2117018_1_1">Consumer Price Index Base Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ConsumerPriceIndexBaseYear_lbl" xml:lang="en-US" id="id_10699837_2117018_2_1">Consumer price index base year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ConsumerPriceIndexBaseYear" xlink:to="aa_ConsumerPriceIndexBaseYear_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ConsumerPriceIndexMember" xlink:label="aa_ConsumerPriceIndexMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ConsumerPriceIndexMember_lbl" xml:lang="en-US" id="id_10699837_2123834_3_1">Consumer Price Index [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ConsumerPriceIndexMember_lbl" xml:lang="en-US" id="id_10699837_2123834_1_1">Consumer Price Index [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ConsumerPriceIndexMember_lbl" xml:lang="en-US" id="id_10699837_2123834_2_1">Consumer Price Index [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ConsumerPriceIndexMember" xlink:to="aa_ConsumerPriceIndexMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ContractTerminationMember" xlink:label="us-gaap_ContractTerminationMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ContractTerminationMember_lbl" xml:lang="en-US" id="id_10699837_2027526_1_1">Contract Termination [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ContractTerminationMember_lbl" xml:lang="en-US" id="id_10699837_2027526_2_1">Contract Termination [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractTerminationMember" xlink:to="us-gaap_ContractTerminationMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ContractualObligation" xlink:label="us-gaap_ContractualObligation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ContractualObligation_lbl" xml:lang="en-US" id="id_10699837_2024281_1_1">Contractual Obligation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ContractualObligation_lbl" xml:lang="en-US" id="id_10699837_2024281_2_1">Gas supply agreement prepayment amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractualObligation" xlink:to="us-gaap_ContractualObligation_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ConvertibleNotesMember" xlink:label="aa_ConvertibleNotesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ConvertibleNotesMember_lbl" xml:lang="en-US" id="id_10699837_2116523_3_1">Convertible Notes [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ConvertibleNotesMember_lbl" xml:lang="en-US" id="id_10699837_2116523_1_1">Convertible Notes [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ConvertibleNotesMember_lbl" xml:lang="en-US" id="id_10699837_2116523_2_1">Convertible Notes [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ConvertibleNotesMember" xlink:to="aa_ConvertibleNotesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConvertiblePreferredDividendsNetOfTax" xlink:label="us-gaap_ConvertiblePreferredDividendsNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConvertiblePreferredDividendsNetOfTax_lbl" xml:lang="en-US" id="id_10699837_2025793_1_1">Convertible Preferred Dividends, Net of Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ConvertiblePreferredDividendsNetOfTax_lbl" xml:lang="en-US" id="id_10699837_2025793_2_1">Add: dividends related to mandatory convertible preferred stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertiblePreferredDividendsNetOfTax" xlink:to="us-gaap_ConvertiblePreferredDividendsNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="us-gaap_CorporateNonSegmentMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CorporateNonSegmentMember_lbl" xml:lang="en-US" id="id_10699837_2027531_1_1">Corporate, Non-Segment [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CorporateNonSegmentMember_lbl" xml:lang="en-US" id="id_10699837_2027531_2_1">Corporate [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CorporateNonSegmentMember" xlink:to="us-gaap_CorporateNonSegmentMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostOfGoodsSoldDepreciationDepletionAndAmortization" xlink:label="us-gaap_CostOfGoodsSoldDepreciationDepletionAndAmortization"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfGoodsSoldDepreciationDepletionAndAmortization_lbl" xml:lang="en-US" id="id_10699837_2021907_1_1">Cost of Goods Sold, Depreciation, Depletion and Amortization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CostOfGoodsSoldDepreciationDepletionAndAmortization_lbl" xml:lang="en-US" id="id_10699837_2021907_2_1">Provision for depreciation, depletion, and amortization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfGoodsSoldDepreciationDepletionAndAmortization" xlink:to="us-gaap_CostOfGoodsSoldDepreciationDepletionAndAmortization_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization" xlink:label="us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization_lbl" xml:lang="en-US" id="id_10699837_2024720_1_1">Cost of Goods Sold, Excluding Depreciation, Depletion, and Amortization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization_lbl" xml:lang="en-US" id="id_10699837_2024720_2_1">Cost of goods sold (exclusive of expenses below)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization" xlink:to="us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostOfServicesEnvironmentalRemediation" xlink:label="us-gaap_CostOfServicesEnvironmentalRemediation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfServicesEnvironmentalRemediation_lbl" xml:lang="en-US" id="id_10699837_2024072_1_1">Cost of Services, Environmental Remediation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CostOfServicesEnvironmentalRemediation_lbl" xml:lang="en-US" id="id_10699837_2024072_2_1">Soil remediation project, estimated cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfServicesEnvironmentalRemediation" xlink:to="us-gaap_CostOfServicesEnvironmentalRemediation_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="us-gaap_CostsAndExpenses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostsAndExpenses_lbl" xml:lang="en-US" id="id_10699837_2025799_1_1">Costs and Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CostsAndExpenses_lbl" xml:lang="en-US" id="id_10699837_2025799_6_1">Total costs and expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostsAndExpenses" xlink:to="us-gaap_CostsAndExpenses_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditDerivativesByContractTypeAxis" xlink:label="us-gaap_CreditDerivativesByContractTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CreditDerivativesByContractTypeAxis_lbl" xml:lang="en-US" id="id_10699837_2027740_1_1">Credit Derivatives Contract Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CreditDerivativesByContractTypeAxis_lbl" xml:lang="en-US" id="id_10699837_2027740_2_1">Credit Derivatives Contract Type [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditDerivativesByContractTypeAxis" xlink:to="us-gaap_CreditDerivativesByContractTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditDerivativesContractTypeDomain" xlink:label="us-gaap_CreditDerivativesContractTypeDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CreditDerivativesContractTypeDomain_lbl" xml:lang="en-US" id="id_10699837_2025385_1_1">Credit Derivatives Contract Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CreditDerivativesContractTypeDomain_lbl" xml:lang="en-US" id="id_10699837_2025385_2_1">Credit Derivatives Contract Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditDerivativesContractTypeDomain" xlink:to="us-gaap_CreditDerivativesContractTypeDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_CreditSpreadBetweenAlcoaAndCounterpartyMember" xlink:label="aa_CreditSpreadBetweenAlcoaAndCounterpartyMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_CreditSpreadBetweenAlcoaAndCounterpartyMember_lbl" xml:lang="en-US" id="id_10699837_2065488_3_1">Credit spread between Alcoa and counterparty.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_CreditSpreadBetweenAlcoaAndCounterpartyMember_lbl" xml:lang="en-US" id="id_10699837_2065488_1_1">Credit Spread Between Alcoa And Counterparty [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_CreditSpreadBetweenAlcoaAndCounterpartyMember_lbl" xml:lang="en-US" id="id_10699837_2065488_2_1">Credit Spread between Alcoa and Counterparty [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_CreditSpreadBetweenAlcoaAndCounterpartyMember" xlink:to="aa_CreditSpreadBetweenAlcoaAndCounterpartyMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_CreditSpreadMember" xlink:label="aa_CreditSpreadMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_CreditSpreadMember_lbl" xml:lang="en-US" id="id_10699837_2321834_3_1">Credit Spread [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_CreditSpreadMember_lbl" xml:lang="en-US" id="id_10699837_2321834_1_1">Credit Spread [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_CreditSpreadMember_lbl" xml:lang="en-US" id="id_10699837_2321834_2_1">Credit Spread [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_CreditSpreadMember" xlink:to="aa_CreditSpreadMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xml:lang="en-US" id="id_10699837_2024507_1_1">Current Fiscal Year End Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xml:lang="en-US" id="id_10699837_2024507_2_1">Current Fiscal Year End Date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CurrentFiscalYearEndDate" xlink:to="dei_CurrentFiscalYearEndDate_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_DampierGasPipelineMember" xlink:label="aa_DampierGasPipelineMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_DampierGasPipelineMember_lbl" xml:lang="en-US" id="id_10699837_2365918_3_1">Dampier gas pipeline.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_DampierGasPipelineMember_lbl" xml:lang="en-US" id="id_10699837_2365918_1_1">Dampier Gas Pipeline [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_DampierGasPipelineMember_lbl" xml:lang="en-US" id="id_10699837_2365918_2_1">Dampier to Bunbury Natural Gas Pipeline [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_DampierGasPipelineMember" xlink:to="aa_DampierGasPipelineMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="us-gaap_DebtInstrumentFairValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xml:lang="en-US" id="id_10699837_2025811_1_1">Debt Instrument, Fair Value Disclosure</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xml:lang="en-US" id="id_10699837_2025811_2_1">Long-term debt due within one year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFairValue" xlink:to="us-gaap_DebtInstrumentFairValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentPeriodicPaymentInterest" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentInterest_lbl" xml:lang="en-US" id="id_10699837_2024079_1_1">Debt Instrument, Periodic Payment, Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentInterest_lbl" xml:lang="en-US" id="id_10699837_2024079_2_1">Debt service requirements, interest maximum</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentPeriodicPaymentInterest" xlink:to="us-gaap_DebtInstrumentPeriodicPaymentInterest_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentPeriodicPaymentPrincipal" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentPrincipal"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentPrincipal_lbl" xml:lang="en-US" id="id_10699837_2023640_1_1">Debt Instrument, Periodic Payment, Principal</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentPrincipal_lbl" xml:lang="en-US" id="id_10699837_2023640_2_1">Debt service requirements, principal</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentPeriodicPaymentPrincipal" xlink:to="us-gaap_DebtInstrumentPeriodicPaymentPrincipal_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract" xlink:label="us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract_lbl" xml:lang="en-US" id="id_10699837_2024736_1_1">Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent" xlink:label="us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_10699837_2024967_1_1">Deferred Credits and Other Liabilities, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_10699837_2024967_2_1">Other noncurrent liabilities and deferred credits</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent" xlink:to="us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_10699837_2028007_1_1">Deferred Income Tax Expense (Benefit)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_10699837_2028007_2_1">Deferred income taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_DeferredPriceCustomerReceivables" xlink:label="aa_DeferredPriceCustomerReceivables"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_DeferredPriceCustomerReceivables_lbl" xml:lang="en-US" id="id_10699837_2351147_3_1">Deferred purchase price customer receivables.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_DeferredPriceCustomerReceivables_lbl" xml:lang="en-US" id="id_10699837_2351147_1_1">Deferred Price Customer Receivables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_DeferredPriceCustomerReceivables_lbl" xml:lang="en-US" id="id_10699837_2351147_2_1">Deferred purchase price receivable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_DeferredPriceCustomerReceivables" xlink:to="aa_DeferredPriceCustomerReceivables_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsNetNoncurrent" xlink:label="us-gaap_DeferredTaxAssetsNetNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsNetNoncurrent_lbl" xml:lang="en-US" id="id_10699837_2025171_1_1">Deferred Tax Assets, Net of Valuation Allowance, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredTaxAssetsNetNoncurrent_lbl" xml:lang="en-US" id="id_10699837_2025171_2_1">Deferred income taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsNetNoncurrent" xlink:to="us-gaap_DeferredTaxAssetsNetNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent" xlink:label="us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_10699837_2021698_1_1">Defined Benefit Pension Plan, Liabilities, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_10699837_2021698_2_1">Accrued pension benefits</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent" xlink:to="us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_DefinedBenefitPensionPlansNetPeriodicBenefitCost" xlink:label="aa_DefinedBenefitPensionPlansNetPeriodicBenefitCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_DefinedBenefitPensionPlansNetPeriodicBenefitCost_lbl" xml:lang="en-US" id="id_10699837_2297120_3_1">The total amount of net periodic benefit cost for defined benefit pension plans for the period excluding settlements, curtailments, and special termination benefits related to restructuring actions. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_DefinedBenefitPensionPlansNetPeriodicBenefitCost_lbl" xml:lang="en-US" id="id_10699837_2297120_1_1">Defined Benefit Pension Plans Net Periodic Benefit Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_DefinedBenefitPensionPlansNetPeriodicBenefitCost_lbl" xml:lang="en-US" id="id_10699837_2297120_2_1">Net periodic pension benefit cost (N)</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_lbl" xml:lang="en-US" id="id_10699837_2023455_1_1">Defined Benefit Plan, Amortization of Gains (Losses)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_lbl" xml:lang="en-US" id="id_10699837_2023455_14_1">Recognized net actuarial loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:to="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_lbl" xml:lang="en-US" id="id_10699837_2021940_1_1">Defined Benefit Plan, Amortization of Prior Service Cost (Credit)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_lbl" xml:lang="en-US" id="id_10699837_2021940_2_1">Amortization of prior service benefit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:to="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod" xlink:label="us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod_lbl" xml:lang="en-US" id="id_10699837_2027350_1_1">Defined Benefit Plan, Cost of Providing Special or Contractual Termination Benefits Recognized During Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod_lbl" xml:lang="en-US" id="id_10699837_2027350_2_1">Special termination benefits</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl" xml:lang="en-US" id="id_10699837_2024750_1_1">Defined Benefit Plan Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl" xml:lang="en-US" id="id_10699837_2024750_2_1">Defined Benefit Plan Disclosure [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:to="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_lbl" xml:lang="en-US" id="id_10699837_2026901_1_1">Defined Benefit Plan, Expected Return on Plan Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_lbl" xml:lang="en-US" id="id_10699837_2026901_14_1">Expected return on plan assets</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="us-gaap_DefinedBenefitPlanInterestCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanInterestCost_lbl" xml:lang="en-US" id="id_10699837_2025615_1_1">Defined Benefit Plan, Interest Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanInterestCost_lbl" xml:lang="en-US" id="id_10699837_2025615_2_1">Interest cost</label>
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    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_DefinedBenefitPlanInterestCostChangeInAccountingEstimateImpact" xlink:label="aa_DefinedBenefitPlanInterestCostChangeInAccountingEstimateImpact"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_DefinedBenefitPlanInterestCostChangeInAccountingEstimateImpact_lbl" xml:lang="en-US" id="id_10699837_2365235_3_1">The estimated reduction in interest cost upon application of change in accounting estimate in next fiscal year.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_DefinedBenefitPlanInterestCostChangeInAccountingEstimateImpact_lbl" xml:lang="en-US" id="id_10699837_2365235_1_1">Defined Benefit Plan Interest Cost Change In Accounting Estimate Impact</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_DefinedBenefitPlanInterestCostChangeInAccountingEstimateImpact_lbl" xml:lang="en-US" id="id_10699837_2365235_2_1">Change in interest cost component of net periodic benefit cost determination</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" xml:lang="en-US" id="id_10699837_2023033_1_1">Defined Benefit Plan, Net Periodic Benefit Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" xml:lang="en-US" id="id_10699837_2023033_6_1">Net periodic benefit cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:to="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments" xlink:label="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_lbl" xml:lang="en-US" id="id_10699837_2026903_1_1">Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_lbl" xml:lang="en-US" id="id_10699837_2026903_14_1">Curtailments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments" xlink:to="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" xlink:label="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_lbl" xml:lang="en-US" id="id_10699837_2022176_1_1">Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_lbl" xml:lang="en-US" id="id_10699837_2022176_14_1">Settlements</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" xlink:to="us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="us-gaap_DefinedBenefitPlanServiceCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanServiceCost_lbl" xml:lang="en-US" id="id_10699837_2021704_1_1">Defined Benefit Plan, Service Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanServiceCost_lbl" xml:lang="en-US" id="id_10699837_2021704_2_1">Service cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanServiceCost" xlink:to="us-gaap_DefinedBenefitPlanServiceCost_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedContributionPlanTypeAxis" xlink:label="us-gaap_DefinedContributionPlanTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedContributionPlanTypeAxis_lbl" xml:lang="en-US" id="id_10699837_2021948_1_1">Defined Contribution Plan Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedContributionPlanTypeAxis_lbl" xml:lang="en-US" id="id_10699837_2021948_2_1">Defined Contribution Plan Type [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanTypeAxis" xlink:to="us-gaap_DefinedContributionPlanTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedContributionPlanTypeDomain" xlink:label="us-gaap_DefinedContributionPlanTypeDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedContributionPlanTypeDomain_lbl" xml:lang="en-US" id="id_10699837_2023890_1_1">Defined Contribution Plan Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedContributionPlanTypeDomain_lbl" xml:lang="en-US" id="id_10699837_2023890_2_1">Defined Contribution Plan Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanTypeDomain" xlink:to="us-gaap_DefinedContributionPlanTypeDomain_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DisposalGroupDeferredGainOnDisposal_lbl" xml:lang="en-US" id="id_10699837_2035386_2_1">Gain from sale of Remmele Medical business</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisposalGroupDeferredGainOnDisposal" xlink:to="us-gaap_DisposalGroupDeferredGainOnDisposal_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_lbl" xml:lang="en-US" id="id_10699837_2028044_1_1">Disposal Group, Including Discontinued Operation, Consideration</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_lbl" xml:lang="en-US" id="id_10699837_2028044_2_1">Cash received on sale of operations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_DisposalGroupIncludingDiscontinuedOperationConsiderationNetOfTransactionCosts" xlink:label="aa_DisposalGroupIncludingDiscontinuedOperationConsiderationNetOfTransactionCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_DisposalGroupIncludingDiscontinuedOperationConsiderationNetOfTransactionCosts_lbl" xml:lang="en-US" id="id_10699837_2392018_3_1">Disposal group, including discontinued operation, consideration, net of transaction costs.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_DisposalGroupIncludingDiscontinuedOperationConsiderationNetOfTransactionCosts_lbl" xml:lang="en-US" id="id_10699837_2392018_1_1">Disposal group, including discontinued operation, consideration, net of transaction costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_DisposalGroupIncludingDiscontinuedOperationConsiderationNetOfTransactionCosts_lbl" xml:lang="en-US" id="id_10699837_2392018_2_1">Sale of Remmele Medical business, net of transaction costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_DisposalGroupIncludingDiscontinuedOperationConsiderationNetOfTransactionCosts" xlink:to="aa_DisposalGroupIncludingDiscontinuedOperationConsiderationNetOfTransactionCosts_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_DisposalOfEquityInterestsMember" xlink:label="aa_DisposalOfEquityInterestsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_DisposalOfEquityInterestsMember_lbl" xml:lang="en-US" id="id_10699837_2392066_3_1">Disposal of Equity Interests [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_DisposalOfEquityInterestsMember_lbl" xml:lang="en-US" id="id_10699837_2392066_1_1">Disposal of Equity Interests [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_DisposalOfEquityInterestsMember_lbl" xml:lang="en-US" id="id_10699837_2392066_2_1">Disposal of Equity Interests [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_DisposalOfEquityInterestsMember" xlink:to="aa_DisposalOfEquityInterestsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_DisposalOfLandMember" xlink:label="aa_DisposalOfLandMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_DisposalOfLandMember_lbl" xml:lang="en-US" id="id_10699837_2392067_3_1">Disposal of Land [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_DisposalOfLandMember_lbl" xml:lang="en-US" id="id_10699837_2392067_1_1">Disposal of Land [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_DisposalOfLandMember_lbl" xml:lang="en-US" id="id_10699837_2392067_2_1">Disposal of Land [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_DisposalOfLandMember" xlink:to="aa_DisposalOfLandMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_DivestedBusinessesMember" xlink:label="aa_DivestedBusinessesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_DivestedBusinessesMember_lbl" xml:lang="en-US" id="id_10699837_2199296_3_1">Divested businesses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_DivestedBusinessesMember_lbl" xml:lang="en-US" id="id_10699837_2199296_1_1">Divested Businesses [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_DivestedBusinessesMember_lbl" xml:lang="en-US" id="id_10699837_2199296_2_1">Divested Businesses [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_DivestedBusinessesMember" xlink:to="aa_DivestedBusinessesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsCashAbstract" xlink:label="us-gaap_DividendsCashAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsCashAbstract_lbl" xml:lang="en-US" id="id_10699837_2025013_1_1">Dividends, Cash [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsCashAbstract_lbl" xml:lang="en-US" id="id_10699837_2025013_2_1">Cash dividends declared:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsCashAbstract" xlink:to="us-gaap_DividendsCashAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:label="us-gaap_DividendsCommonStockCash"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsCommonStockCash_lbl" xml:lang="en-US" id="id_10699837_2027154_1_1">Dividends, Common Stock, Cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DividendsCommonStockCash_lbl" xml:lang="en-US" id="id_10699837_2027154_14_1">Common share, value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsCommonStockCash" xlink:to="us-gaap_DividendsCommonStockCash_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsPreferredStockCash" xlink:label="us-gaap_DividendsPreferredStockCash"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsPreferredStockCash_lbl" xml:lang="en-US" id="id_10699837_2027591_1_1">Dividends, Preferred Stock, Cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DividendsPreferredStockCash_lbl" xml:lang="en-US" id="id_10699837_2027591_14_1">Preferred share, value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPreferredStockCash" xlink:to="us-gaap_DividendsPreferredStockCash_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_DocumentAndEntityInformationAbstract" xlink:label="aa_DocumentAndEntityInformationAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_DocumentAndEntityInformationAbstract_lbl" xml:lang="en-US" id="id_10699837_2260742_3_1">Document and Entity Information [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_DocumentAndEntityInformationAbstract_lbl" xml:lang="en-US" id="id_10699837_2260742_1_1">Document And Entity Information [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_DocumentAndEntityInformationAbstract_lbl" xml:lang="en-US" id="id_10699837_2260742_2_1">Document And Entity Information [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_DocumentAndEntityInformationAbstract" xlink:to="aa_DocumentAndEntityInformationAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xml:lang="en-US" id="id_10699837_2025647_1_1">Document Fiscal Period Focus</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xml:lang="en-US" id="id_10699837_2025647_2_1">Document Fiscal Period Focus</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalPeriodFocus" xlink:to="dei_DocumentFiscalPeriodFocus_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalYearFocus_lbl" xml:lang="en-US" id="id_10699837_2024142_1_1">Document Fiscal Year Focus</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentFiscalYearFocus_lbl" xml:lang="en-US" id="id_10699837_2024142_2_1">Document Fiscal Year Focus</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalYearFocus" xlink:to="dei_DocumentFiscalYearFocus_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentPeriodEndDate_lbl" xml:lang="en-US" id="id_10699837_2023078_1_1">Document Period End Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentPeriodEndDate_lbl" xml:lang="en-US" id="id_10699837_2023078_2_1">Document Period End Date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentType_lbl" xml:lang="en-US" id="id_10699837_2022383_1_1">Document Type</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentType_lbl" xml:lang="en-US" id="id_10699837_2022383_2_1">Document Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="us-gaap_EarningsPerShareAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xml:lang="en-US" id="id_10699837_2022611_1_1">Earnings Per Share [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xml:lang="en-US" id="id_10699837_2022611_2_1">Earnings per share:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareAbstract" xlink:to="us-gaap_EarningsPerShareAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="us-gaap_EarningsPerShareBasic"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xml:lang="en-US" id="id_10699837_2024783_1_1">Earnings Per Share, Basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xml:lang="en-US" id="id_10699837_2024783_2_1">Basic</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasic" xlink:to="us-gaap_EarningsPerShareBasic_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="us-gaap_EarningsPerShareDiluted"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xml:lang="en-US" id="id_10699837_2025654_1_1">Earnings Per Share, Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xml:lang="en-US" id="id_10699837_2025654_2_1">Diluted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareDiluted" xlink:to="us-gaap_EarningsPerShareDiluted_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="us-gaap_EarningsPerShareTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xml:lang="en-US" id="id_10699837_2027799_1_1">Earnings Per Share [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xml:lang="en-US" id="id_10699837_2027799_2_1">Earnings Per Share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareTextBlock" xlink:to="us-gaap_EarningsPerShareTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_EastStLouisSiteMember" xlink:label="aa_EastStLouisSiteMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_EastStLouisSiteMember_lbl" xml:lang="en-US" id="id_10699837_2352576_3_1">East St. Louis site.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_EastStLouisSiteMember_lbl" xml:lang="en-US" id="id_10699837_2352576_1_1">East St Louis Site [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_EastStLouisSiteMember_lbl" xml:lang="en-US" id="id_10699837_2352576_2_1">East St. Louis, IL Site [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_EastStLouisSiteMember" xlink:to="aa_EastStLouisSiteMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectOfCashFlowHedgesOnResultsOfOperationsAbstract" xlink:label="us-gaap_EffectOfCashFlowHedgesOnResultsOfOperationsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectOfCashFlowHedgesOnResultsOfOperationsAbstract_lbl" xml:lang="en-US" id="id_10699837_2023923_1_1">Effect of Cash Flow Hedges on Results of Operations [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EffectOfCashFlowHedgesOnResultsOfOperationsAbstract_lbl" xml:lang="en-US" id="id_10699837_2023923_2_1">Cash flow hedges</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectOfCashFlowHedgesOnResultsOfOperationsAbstract" xlink:to="us-gaap_EffectOfCashFlowHedgesOnResultsOfOperationsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_lbl" xml:lang="en-US" id="id_10699837_2023673_1_1">Effect of Exchange Rate on Cash and Cash Equivalents</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_lbl" xml:lang="en-US" id="id_10699837_2023673_2_1">EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:to="us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ElectricUtilityRevenue" xlink:label="us-gaap_ElectricUtilityRevenue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ElectricUtilityRevenue_lbl" xml:lang="en-US" id="id_10699837_2027168_1_1">Electric Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ElectricUtilityRevenue_lbl" xml:lang="en-US" id="id_10699837_2027168_2_1">Sale generated by Yadkin</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ElectricUtilityRevenue" xlink:to="us-gaap_ElectricUtilityRevenue_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_EmbeddedAluminumDerivativeMember" xlink:label="aa_EmbeddedAluminumDerivativeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_EmbeddedAluminumDerivativeMember_lbl" xml:lang="en-US" id="id_10699837_2060685_3_1">Embedded Aluminum Derivative [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_EmbeddedAluminumDerivativeMember_lbl" xml:lang="en-US" id="id_10699837_2060685_1_1">Embedded Aluminum Derivative [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_EmbeddedAluminumDerivativeMember_lbl" xml:lang="en-US" id="id_10699837_2060685_2_1">Embedded Aluminum Derivative [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_EmbeddedAluminumDerivativeMember" xlink:to="aa_EmbeddedAluminumDerivativeMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_EmbeddedCreditDerivativeMember" xlink:label="aa_EmbeddedCreditDerivativeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_EmbeddedCreditDerivativeMember_lbl" xml:lang="en-US" id="id_10699837_2214087_3_1">Embedded credit derivative.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_EmbeddedCreditDerivativeMember_lbl" xml:lang="en-US" id="id_10699837_2214087_1_1">Embedded Credit Derivative [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_EmbeddedCreditDerivativeMember_lbl" xml:lang="en-US" id="id_10699837_2214087_2_1">Embedded Credit Derivative [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_EmbeddedCreditDerivativeMember" xlink:to="aa_EmbeddedCreditDerivativeMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xml:lang="en-US" id="id_10699837_2021517_1_1">Employee-related Liabilities, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xml:lang="en-US" id="id_10699837_2021517_2_1">Accrued compensation and retirement costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:to="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeSeveranceMember" xlink:label="us-gaap_EmployeeSeveranceMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeSeveranceMember_lbl" xml:lang="en-US" id="id_10699837_2025876_1_1">Employee Severance [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EmployeeSeveranceMember_lbl" xml:lang="en-US" id="id_10699837_2025876_2_1">Layoff Costs [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeSeveranceMember" xlink:to="us-gaap_EmployeeSeveranceMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="us-gaap_EmployeeStockOptionMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xml:lang="en-US" id="id_10699837_2022619_1_1">Employee Stock Option [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xml:lang="en-US" id="id_10699837_2022619_2_1">Stock Options [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeStockOptionMember" xlink:to="us-gaap_EmployeeStockOptionMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EnergyRelatedDerivativeMember" xlink:label="us-gaap_EnergyRelatedDerivativeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EnergyRelatedDerivativeMember_lbl" xml:lang="en-US" id="id_10699837_2035403_1_1">Energy Related Derivative [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EnergyRelatedDerivativeMember_lbl" xml:lang="en-US" id="id_10699837_2035403_2_1">Energy Contracts [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EnergyRelatedDerivativeMember" xlink:to="us-gaap_EnergyRelatedDerivativeMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_EngineeredProductsAndSolutionsMember" xlink:label="aa_EngineeredProductsAndSolutionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_EngineeredProductsAndSolutionsMember_lbl" xml:lang="en-US" id="id_10699837_2361384_3_1">Engineered products and solutions.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_EngineeredProductsAndSolutionsMember_lbl" xml:lang="en-US" id="id_10699837_2361384_1_1">Engineered Products And Solutions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_EngineeredProductsAndSolutionsMember_lbl" xml:lang="en-US" id="id_10699837_2361384_2_1">Engineered Products and Solutions [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_EngineeredProductsAndSolutionsMember" xlink:to="aa_EngineeredProductsAndSolutionsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityCentralIndexKey_lbl" xml:lang="en-US" id="id_10699837_2022397_1_1">Entity Central Index Key</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntityCentralIndexKey_lbl" xml:lang="en-US" id="id_10699837_2022397_2_1">Entity Central Index Key</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xml:lang="en-US" id="id_10699837_2025882_1_1">Entity Common Stock, Shares Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xml:lang="en-US" id="id_10699837_2025882_2_1">Entity Common Stock, Shares Outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCommonStockSharesOutstanding" xlink:to="dei_EntityCommonStockSharesOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityDomain_lbl" xml:lang="en-US" id="id_10699837_2026748_1_1">Entity [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntityDomain_lbl" xml:lang="en-US" id="id_10699837_2026748_2_1">Entity [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityDomain" xlink:to="dei_EntityDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityFilerCategory_lbl" xml:lang="en-US" id="id_10699837_2025883_1_1">Entity Filer Category</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntityFilerCategory_lbl" xml:lang="en-US" id="id_10699837_2025883_2_1">Entity Filer Category</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFilerCategory" xlink:to="dei_EntityFilerCategory_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityRegistrantName_lbl" xml:lang="en-US" id="id_10699837_2021744_1_1">Entity Registrant Name</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntityRegistrantName_lbl" xml:lang="en-US" id="id_10699837_2021744_2_1">Entity Registrant Name</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_EnvironmentalRemediationCostsAndPayments" xlink:label="aa_EnvironmentalRemediationCostsAndPayments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_EnvironmentalRemediationCostsAndPayments_lbl" xml:lang="en-US" id="id_10699837_2196591_3_1">Environmental remediation costs and payments.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_EnvironmentalRemediationCostsAndPayments_lbl" xml:lang="en-US" id="id_10699837_2196591_1_1">Environmental Remediation Costs And Payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_EnvironmentalRemediationCostsAndPayments_lbl" xml:lang="en-US" id="id_10699837_2196591_2_1">Costs and payments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_EnvironmentalRemediationCostsAndPayments" xlink:to="aa_EnvironmentalRemediationCostsAndPayments_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_EnvironmentalRemediationDamages" xlink:label="aa_EnvironmentalRemediationDamages"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_EnvironmentalRemediationDamages_lbl" xml:lang="en-US" id="id_10699837_2347096_3_1">Environmental remediation damages.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_EnvironmentalRemediationDamages_lbl" xml:lang="en-US" id="id_10699837_2347096_1_1">Environmental Remediation Damages</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_EnvironmentalRemediationDamages_lbl" xml:lang="en-US" id="id_10699837_2347096_2_1">Costs and payments related to damages</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_EnvironmentalRemediationDamages" xlink:to="aa_EnvironmentalRemediationDamages_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_EnvironmentalRemediationMember" xlink:label="aa_EnvironmentalRemediationMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_EnvironmentalRemediationMember_lbl" xml:lang="en-US" id="id_10699837_2058794_3_1">Environmental remediation.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_EnvironmentalRemediationMember_lbl" xml:lang="en-US" id="id_10699837_2058794_1_1">Environmental Remediation [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_EnvironmentalRemediationMember_lbl" xml:lang="en-US" id="id_10699837_2058794_2_1">Environmental Remediation [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_EnvironmentalRemediationMember" xlink:to="aa_EnvironmentalRemediationMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_EnvironmentalRemediationPaymentsForEmergencyActionAndNaturalResourcesDamages" xlink:label="aa_EnvironmentalRemediationPaymentsForEmergencyActionAndNaturalResourcesDamages"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_EnvironmentalRemediationPaymentsForEmergencyActionAndNaturalResourcesDamages_lbl" xml:lang="en-US" id="id_10699837_2312422_3_1">Environmental remediation payments for emergency action and natural resources damages.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_EnvironmentalRemediationPaymentsForEmergencyActionAndNaturalResourcesDamages_lbl" xml:lang="en-US" id="id_10699837_2312422_1_1">Environmental Remediation Payments For Emergency Action and Natural Resources Damages</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_EnvironmentalRemediationPaymentsForEmergencyActionAndNaturalResourcesDamages_lbl" xml:lang="en-US" id="id_10699837_2312422_2_1">Payments for emergency action and natural resource damages</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_EnvironmentalRemediationPaymentsForEmergencyActionAndNaturalResourcesDamages" xlink:to="aa_EnvironmentalRemediationPaymentsForEmergencyActionAndNaturalResourcesDamages_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityAbstract_lbl" xml:lang="en-US" id="id_10699837_2025026_1_1">Equity [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityAbstract_lbl" xml:lang="en-US" id="id_10699837_2025026_2_1">Equity [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_EquityAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityComponentDomain_lbl" xml:lang="en-US" id="id_10699837_2027813_1_1">Equity Component [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityComponentDomain_lbl" xml:lang="en-US" id="id_10699837_2027813_2_1">Equity Component [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_EquityComponentDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="us-gaap_EquityMethodInvesteeNameDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvesteeNameDomain_lbl" xml:lang="en-US" id="id_10699837_2035408_1_1">Investment, Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityMethodInvesteeNameDomain_lbl" xml:lang="en-US" id="id_10699837_2035408_2_1">Investment, Name [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvesteeNameDomain" xlink:to="us-gaap_EquityMethodInvesteeNameDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xml:lang="en-US" id="id_10699837_2024573_1_1">Equity Method Investment, Ownership Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xml:lang="en-US" id="id_10699837_2024573_2_1">Percentage of shares retained</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:to="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_EquityMethodInvestmentOwnershipPercentageSold" xlink:label="aa_EquityMethodInvestmentOwnershipPercentageSold"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_EquityMethodInvestmentOwnershipPercentageSold_lbl" xml:lang="en-US" id="id_10699837_2336245_3_1">Equity method investment ownership percentage sold.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_EquityMethodInvestmentOwnershipPercentageSold_lbl" xml:lang="en-US" id="id_10699837_2336245_1_1">Equity Method Investment Ownership Percentage Sold</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_EquityMethodInvestmentOwnershipPercentageSold_lbl" xml:lang="en-US" id="id_10699837_2336245_2_1">Investment percentage in DBP to be sold</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_EquityMethodInvestmentOwnershipPercentageSold" xlink:to="aa_EquityMethodInvestmentOwnershipPercentageSold_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="us-gaap_EquityMethodInvestments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestments_lbl" xml:lang="en-US" id="id_10699837_2026123_1_1">Equity Method Investments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityMethodInvestments_lbl" xml:lang="en-US" id="id_10699837_2026123_2_1">Equity investments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestments" xlink:to="us-gaap_EquityMethodInvestments_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales_lbl" xml:lang="en-US" id="id_10699837_2027410_1_1">Equity Method Investment, Summarized Financial Information, Cost of Sales</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales_lbl" xml:lang="en-US" id="id_10699837_2027410_2_1">Cost of goods sold</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales" xlink:to="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCostOfSales_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_lbl" xml:lang="en-US" id="id_10699837_2025028_1_1">Equity Method Investment, Summarized Financial Information, Net Income (Loss)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_lbl" xml:lang="en-US" id="id_10699837_2025028_2_1">Net income (loss)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss" xlink:to="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue_lbl" xml:lang="en-US" id="id_10699837_2023100_1_1">Equity Method Investment, Summarized Financial Information, Revenue</label>
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    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_EstimatedForeignCurrencyExchangeRateMember" xlink:label="aa_EstimatedForeignCurrencyExchangeRateMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_EstimatedForeignCurrencyExchangeRateMember_lbl" xml:lang="en-US" id="id_10699837_2168882_3_1">Estimated Foreign Currency Exchange Rate [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_EstimatedForeignCurrencyExchangeRateMember_lbl" xml:lang="en-US" id="id_10699837_2168882_1_1">Estimated Foreign Currency Exchange Rate [Member]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_lbl" xml:lang="en-US" id="id_10699837_2022224_1_1">Excess Tax Benefit from Share-based Compensation, Financing Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_lbl" xml:lang="en-US" id="id_10699837_2022224_2_1">Excess tax benefits from stock-based payment arrangements</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:label="us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities"/>
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    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ExchangeTradedFixedIncomeAndEquitySecuritiesMember" xlink:label="aa_ExchangeTradedFixedIncomeAndEquitySecuritiesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ExchangeTradedFixedIncomeAndEquitySecuritiesMember_lbl" xml:lang="en-US" id="id_10699837_2392051_3_1">Exchange traded fixed income and equity securities.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ExchangeTradedFixedIncomeAndEquitySecuritiesMember_lbl" xml:lang="en-US" id="id_10699837_2392051_1_1">Exchange Traded Fixed Income And Equity Securities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ExchangeTradedFixedIncomeAndEquitySecuritiesMember_lbl" xml:lang="en-US" id="id_10699837_2392051_2_1">Exchange Traded Fixed Income and Equity Securities [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ExchangeTradedFixedIncomeAndEquitySecuritiesMember" xlink:to="aa_ExchangeTradedFixedIncomeAndEquitySecuritiesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ExpectedConsumerPriceIndex" xlink:label="aa_ExpectedConsumerPriceIndex"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ExpectedConsumerPriceIndex_lbl" xml:lang="en-US" id="id_10699837_2186701_3_1">Expected consumer price index.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ExpectedConsumerPriceIndex_lbl" xml:lang="en-US" id="id_10699837_2186701_1_1">Expected Consumer Price Index</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ExpectedConsumerPriceIndex_lbl" xml:lang="en-US" id="id_10699837_2186701_2_1">Expected consumer price index</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ExpectedConsumerPriceIndex" xlink:to="aa_ExpectedConsumerPriceIndex_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ExpectedDateOfConsumerPriceIndex" xlink:label="aa_ExpectedDateOfConsumerPriceIndex"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ExpectedDateOfConsumerPriceIndex_lbl" xml:lang="en-US" id="id_10699837_2244392_3_1">Expected date of consumer price index.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ExpectedDateOfConsumerPriceIndex_lbl" xml:lang="en-US" id="id_10699837_2244392_1_1">Expected Date Of Consumer Price Index</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ExpectedDateOfConsumerPriceIndex_lbl" xml:lang="en-US" id="id_10699837_2244392_2_1">Expected consumer price index, Year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ExpectedDateOfConsumerPriceIndex" xlink:to="aa_ExpectedDateOfConsumerPriceIndex_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xml:lang="en-US" id="id_10699837_2024160_1_1">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xml:lang="en-US" id="id_10699837_2024160_2_1">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xml:lang="en-US" id="id_10699837_2028078_1_1">Fair Value Measurements, Recurring and Nonrecurring [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xml:lang="en-US" id="id_10699837_2028078_2_1">Fair Value Measurements, Recurring and Nonrecurring [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold_lbl" xml:lang="en-US" id="id_10699837_2231361_3_1">Fair value assets measured on recurring basis gain loss included in cost of goods sold.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold_lbl" xml:lang="en-US" id="id_10699837_2231361_1_1">Fair Value Assets Measured On Recurring Basis Gain Loss Included In Cost Of Goods Sold</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold_lbl" xml:lang="en-US" id="id_10699837_2231361_2_1">Fair value measurement, Assets, Cost of goods sold</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold" xlink:to="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses_lbl" xml:lang="en-US" id="id_10699837_2167156_3_1">Fair value assets measured on recurring basis gain loss included in other expenses.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses_lbl" xml:lang="en-US" id="id_10699837_2167156_1_1">Fair Value Assets Measured On Recurring Basis Gain Loss Included In Other Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses_lbl" xml:lang="en-US" id="id_10699837_2167156_2_1">Fair value measurement, Assets, Other income , net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses_lbl" xml:lang="en-US" id="id_10699837_2167156_12_1">Fair value measurement, Assets, Other income, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses" xlink:to="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSales" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSales"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSales_lbl" xml:lang="en-US" id="id_10699837_2111840_3_1">Fair value assets measured on recurring basis gain loss included in sales.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSales_lbl" xml:lang="en-US" id="id_10699837_2111840_1_1">Fair Value Assets Measured On Recurring Basis Gain Loss Included In Sales</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSales_lbl" xml:lang="en-US" id="id_10699837_2111840_2_1">Fair value measurement, Assets, Sales</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSales" xlink:to="aa_FairValueAssetsMeasuredOnRecurringBasisGainLossIncludedInSales_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xml:lang="en-US" id="id_10699837_2026313_1_1">Asset Class [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xml:lang="en-US" id="id_10699837_2026313_2_1">Asset Class [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl" xml:lang="en-US" id="id_10699837_2026965_1_1">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl" xml:lang="en-US" id="id_10699837_2026965_2_1">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_lbl" xml:lang="en-US" id="id_10699837_2024363_1_1">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_lbl" xml:lang="en-US" id="id_10699837_2024363_2_1">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="us-gaap_FairValueByAssetClassAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xml:lang="en-US" id="id_10699837_2026315_1_1">Asset Class [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xml:lang="en-US" id="id_10699837_2026315_2_1">Asset Class [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByAssetClassAxis" xlink:to="us-gaap_FairValueByAssetClassAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xml:lang="en-US" id="id_10699837_2022410_1_1">Fair Value, Hierarchy [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xml:lang="en-US" id="id_10699837_2022410_2_1">Fair Value, Hierarchy [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueByMeasurementBasisAxis_lbl" xml:lang="en-US" id="id_10699837_2022642_1_1">Measurement Basis [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueByMeasurementBasisAxis_lbl" xml:lang="en-US" id="id_10699837_2022642_2_1">Measurement Basis [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByMeasurementBasisAxis" xlink:to="us-gaap_FairValueByMeasurementBasisAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueDisclosureItemAmountsDomain_lbl" xml:lang="en-US" id="id_10699837_2028080_1_1">Fair Value Measurement [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueDisclosureItemAmountsDomain_lbl" xml:lang="en-US" id="id_10699837_2028080_2_1">Fair Value Measurement [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosureItemAmountsDomain" xlink:to="us-gaap_FairValueDisclosureItemAmountsDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xml:lang="en-US" id="id_10699837_2025479_1_1">Fair Value Disclosures [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xml:lang="en-US" id="id_10699837_2025479_2_1">Fair Value Disclosures [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueDisclosuresAbstract_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xml:lang="en-US" id="id_10699837_2026970_1_1">Fair Value, Inputs, Level 1 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xml:lang="en-US" id="id_10699837_2026970_2_1">Level 1 [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel1Member" xlink:to="us-gaap_FairValueInputsLevel1Member_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xml:lang="en-US" id="id_10699837_2022419_1_1">Fair Value, Inputs, Level 3 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xml:lang="en-US" id="id_10699837_2022419_2_1">Level 3 [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel3Member" xlink:to="us-gaap_FairValueInputsLevel3Member_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold" xlink:label="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold_lbl" xml:lang="en-US" id="id_10699837_2080466_3_1">Fair value liabilities measured on recurring basis gain loss included in cost of goods sold.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold_lbl" xml:lang="en-US" id="id_10699837_2080466_1_1">Fair Value Liabilities Measured On Recurring Basis Gain Loss Included In Cost Of Goods Sold</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold_lbl" xml:lang="en-US" id="id_10699837_2080466_2_1">Fair value measurement, Liabilities, Cost of goods sold</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold" xlink:to="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInCostOfGoodsSold_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses" xlink:label="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses_lbl" xml:lang="en-US" id="id_10699837_2044577_3_1">Fair value liabilities measured on recurring basis gain loss included in other expenses.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses_lbl" xml:lang="en-US" id="id_10699837_2044577_1_1">Fair Value Liabilities Measured On Recurring Basis Gain Loss Included In Other Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses_lbl" xml:lang="en-US" id="id_10699837_2044577_2_1">Fair value measurement, Liabilities, Other income, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses" xlink:to="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInOtherExpenses_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInSales" xlink:label="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInSales"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInSales_lbl" xml:lang="en-US" id="id_10699837_2251184_3_1">Fair value liabilities measured on recurring basis gain loss included in sales.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInSales_lbl" xml:lang="en-US" id="id_10699837_2251184_1_1">Fair Value Liabilities Measured On Recurring Basis Gain Loss Included In Sales</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInSales_lbl" xml:lang="en-US" id="id_10699837_2251184_2_1">Fair value measurement, Liabilities, Sales</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInSales" xlink:to="aa_FairValueLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInSales_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xml:lang="en-US" id="id_10699837_2023956_1_1">Fair Value Hierarchy [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xml:lang="en-US" id="id_10699837_2023956_2_1">Fair Value Hierarchy [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetCostOfGoodsSold" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetCostOfGoodsSold"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetCostOfGoodsSold_lbl" xml:lang="en-US" id="id_10699837_2347569_3_1">Fair value measurement with unobservable inputs reconciliation recurring basis asset cost of goods sold.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetCostOfGoodsSold_lbl" xml:lang="en-US" id="id_10699837_2347569_1_1">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Cost Of Goods Sold</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetCostOfGoodsSold_lbl" xml:lang="en-US" id="id_10699837_2347569_14_1">Fair value measurement, Assets, Cost of goods sold</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetCostOfGoodsSold" xlink:to="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetCostOfGoodsSold_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationAdjustments" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationAdjustments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationAdjustments_lbl" xml:lang="en-US" id="id_10699837_2248400_3_1">Fair value measurement with unobservable inputs reconciliation recurring basis asset foreign currency translation adjustments.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationAdjustments_lbl" xml:lang="en-US" id="id_10699837_2248400_1_1">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Foreign Currency Translation Adjustments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationAdjustments_lbl" xml:lang="en-US" id="id_10699837_2248400_2_1">Fair value measurement, Assets, Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationAdjustments" xlink:to="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetForeignCurrencyTranslationAdjustments_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_lbl" xml:lang="en-US" id="id_10699837_2024592_1_1">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_lbl" xml:lang="en-US" id="id_10699837_2024592_14_1">Fair value measurement, Assets, Other comprehensive income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOther" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOther"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOther_lbl" xml:lang="en-US" id="id_10699837_2374854_3_1">Fair value measurement with unobservable inputs reconciliation recurring basis asset other.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOther_lbl" xml:lang="en-US" id="id_10699837_2374854_1_1">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOther_lbl" xml:lang="en-US" id="id_10699837_2374854_2_1">Fair value measurement, Assets, Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOther" xlink:to="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOther_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements_lbl" xml:lang="en-US" id="id_10699837_2022655_1_1">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements_lbl" xml:lang="en-US" id="id_10699837_2022655_2_1">Fair value measurement, Assets, Purchases, sales and settlements</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements_lbl" xml:lang="en-US" id="id_10699837_2022655_12_1">Fair value measurement, Assets, Purchases, sales, issuances, and settlements</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_lbl" xml:lang="en-US" id="id_10699837_2025908_1_1">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_lbl" xml:lang="en-US" id="id_10699837_2025908_14_1">Fair value measurement, Assets, Sales</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl" xml:lang="en-US" id="id_10699837_2025040_1_1">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl" xml:lang="en-US" id="id_10699837_2025040_2_1">Fair value measurement, Assets, Transfers into and/or out of Level 3</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xml:lang="en-US" id="id_10699837_2025910_1_1">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xml:lang="en-US" id="id_10699837_2025910_4_1">Fair value measurement, Assets, Ending balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xml:lang="en-US" id="id_10699837_2025910_5_1">Fair value measurement, Assets, Beginning balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitiesForeignCurrencyTranslationAdjustments" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitiesForeignCurrencyTranslationAdjustments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitiesForeignCurrencyTranslationAdjustments_lbl" xml:lang="en-US" id="id_10699837_2298357_3_1">Fair value measurement with unobservable inputs reconciliation recurring basis liabilities foreign currency translation adjustments.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitiesOther_lbl" xml:lang="en-US" id="id_10699837_2392071_3_1">Fair value measurement with unobservable inputs reconciliation recurring basis liabilities other.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitiesOther_lbl" xml:lang="en-US" id="id_10699837_2392071_1_1">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liabilities Other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitiesOther_lbl" xml:lang="en-US" id="id_10699837_2392071_2_1">Fair value measurement, Liabilities, Other</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome_lbl" xml:lang="en-US" id="id_10699837_2021771_1_1">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome_lbl" xml:lang="en-US" id="id_10699837_2021771_2_1">Fair value measurement, Liabilities, Other comprehensive income</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesSalesIssuancesSettlements_lbl" xml:lang="en-US" id="id_10699837_2024816_1_1">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesSalesIssuancesSettlements_lbl" xml:lang="en-US" id="id_10699837_2024816_2_1">Fair value measurement, Liabilities, Purchases, sales, issuances, and settlements</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_lbl" xml:lang="en-US" id="id_10699837_2023285_1_1">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_lbl" xml:lang="en-US" id="id_10699837_2023285_2_1">Fair value measurement, Liabilities, Transfers into and/or out of Level 3</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" xml:lang="en-US" id="id_10699837_2028090_1_1">Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" xml:lang="en-US" id="id_10699837_2028090_4_1">Fair value measurement, Liabilities, Ending balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" xml:lang="en-US" id="id_10699837_2028090_5_1">Fair value measurement, Liabilities, Beginning balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTableTextBlock" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTableTextBlock_lbl" xml:lang="en-US" id="id_10699837_2023286_1_1">Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FinancialGuaranteeMember_lbl" xml:lang="en-US" id="id_10699837_2026562_2_1">Financial Guarantee [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xml:lang="en-US" id="id_10699837_2035448_2_1">Finite-Lived Intangible Assets by Major Class [Axis]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xml:lang="en-US" id="id_10699837_2027645_2_1">Finite-Lived Intangible Assets, Major Class Name [Domain]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FirstInstallmentMember_lbl" xml:lang="en-US" id="id_10699837_2066271_1_1">First Installment [Member]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignExchangeContractMember" xlink:label="us-gaap_ForeignExchangeContractMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ForeignExchangeContractMember_lbl" xml:lang="en-US" id="id_10699837_2021560_1_1">Foreign Exchange Contract [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ForeignExchangeContractMember_lbl" xml:lang="en-US" id="id_10699837_2021560_2_1">Foreign Exchange Contracts [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ForeignExchangeContractMember" xlink:to="us-gaap_ForeignExchangeContractMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_FundingOfCustomerReceivablesSold" xlink:label="aa_FundingOfCustomerReceivablesSold"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FundingOfCustomerReceivablesSold_lbl" xml:lang="en-US" id="id_10699837_2243844_3_1">Funding of customer receivables sold.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FundingOfCustomerReceivablesSold_lbl" xml:lang="en-US" id="id_10699837_2243844_1_1">Funding Of Customer Receivables Sold</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_FundingOfCustomerReceivablesSold_lbl" xml:lang="en-US" id="id_10699837_2243844_2_1">Funding of customer receivables sold</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_FundingOfCustomerReceivablesSold" xlink:to="aa_FundingOfCustomerReceivablesSold_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_FusinaSiteMember" xlink:label="aa_FusinaSiteMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_FusinaSiteMember_lbl" xml:lang="en-US" id="id_10699837_2333243_3_1">Fusina site.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_FusinaSiteMember_lbl" xml:lang="en-US" id="id_10699837_2333243_1_1">Fusina Site [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_FusinaSiteMember_lbl" xml:lang="en-US" id="id_10699837_2333243_2_1">Fusina [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_FusinaSiteMember" xlink:to="aa_FusinaSiteMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet" xlink:label="us-gaap_GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet_lbl" xml:lang="en-US" id="id_10699837_2031352_1_1">Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet_lbl" xml:lang="en-US" id="id_10699837_2031352_2_1">Other expenses (income), net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet" xlink:to="us-gaap_GainLossFromComponentsExcludedFromAssessmentOfCashFlowHedgeEffectivenessNet_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_GainLossFromSaleOfLifeInsurancePolicies" xlink:label="aa_GainLossFromSaleOfLifeInsurancePolicies"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_GainLossFromSaleOfLifeInsurancePolicies_lbl" xml:lang="en-US" id="id_10699837_2392858_3_1">Gain loss from sale of life insurance policies.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_GainLossFromSaleOfLifeInsurancePolicies_lbl" xml:lang="en-US" id="id_10699837_2392858_1_1">Gain Loss From Sale Of Life Insurance Policies</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_GainLossFromSaleOfLifeInsurancePolicies_lbl" xml:lang="en-US" id="id_10699837_2392858_2_1">Gain or loss recognized on sale of company-owned life insurance policies</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_GainLossFromSaleOfLifeInsurancePolicies" xlink:to="aa_GainLossFromSaleOfLifeInsurancePolicies_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets1" xlink:label="us-gaap_GainLossOnDispositionOfAssets1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xml:lang="en-US" id="id_10699837_2032210_1_1">Gain (Loss) on Disposition of Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xml:lang="en-US" id="id_10699837_2032210_2_1">Net loss (gain) from asset sales</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xml:lang="en-US" id="id_10699837_2032210_14_1">Net gain from asset sales</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xml:lang="en-US" id="id_10699837_2032210_18_1">Net gain from investing activities - asset sales (G &amp; J)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnDispositionOfAssets1" xlink:to="us-gaap_GainLossOnDispositionOfAssets1_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_GainLossOnInvestmentsNetOfTax" xlink:label="aa_GainLossOnInvestmentsNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_GainLossOnInvestmentsNetOfTax_lbl" xml:lang="en-US" id="id_10699837_2058834_3_1">Gain loss on investments net of tax.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_GainLossOnInvestmentsNetOfTax_lbl" xml:lang="en-US" id="id_10699837_2058834_1_1">Gain Loss On Investments Net Of Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_GainLossOnInvestmentsNetOfTax_lbl" xml:lang="en-US" id="id_10699837_2058834_2_1">Loss on sale of investment, after tax</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_GainLossOnInvestmentsNetOfTax" xlink:to="aa_GainLossOnInvestmentsNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnSaleOfInvestments" xlink:label="us-gaap_GainLossOnSaleOfInvestments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainLossOnSaleOfInvestments_lbl" xml:lang="en-US" id="id_10699837_2029408_1_1">Gain (Loss) on Sale of Investments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_GainLossOnSaleOfInvestments_lbl" xml:lang="en-US" id="id_10699837_2029408_14_1">Loss on sale of investment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnSaleOfInvestments" xlink:to="us-gaap_GainLossOnSaleOfInvestments_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_GasSupplyPrepayment" xlink:label="aa_GasSupplyPrepayment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_GasSupplyPrepayment_lbl" xml:lang="en-US" id="id_10699837_2320955_3_1">Gas supply prepayment.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_GasSupplyPrepayment_lbl" xml:lang="en-US" id="id_10699837_2320955_1_1">Gas Supply Prepayment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_GasSupplyPrepayment_lbl" xml:lang="en-US" id="id_10699837_2320955_2_1">Asset included in other noncurrent assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_GasSupplyPrepayment" xlink:to="aa_GasSupplyPrepayment_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_GlobalRolledProductsMember" xlink:label="aa_GlobalRolledProductsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_GlobalRolledProductsMember_lbl" xml:lang="en-US" id="id_10699837_2239690_3_1">Global rolled products.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_GlobalRolledProductsMember_lbl" xml:lang="en-US" id="id_10699837_2239690_1_1">Global Rolled Products [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_GlobalRolledProductsMember_lbl" xml:lang="en-US" id="id_10699837_2239690_2_1">Global Rolled Products [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_GlobalRolledProductsMember" xlink:to="aa_GlobalRolledProductsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Goodwill" xlink:label="us-gaap_Goodwill"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Goodwill_lbl" xml:lang="en-US" id="id_10699837_2031370_1_1">Goodwill</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Goodwill_lbl" xml:lang="en-US" id="id_10699837_2031370_2_1">Goodwill</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_Goodwill_lbl" xml:lang="en-US" id="id_10699837_2031370_12_1">Goodwill (E)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Goodwill" xlink:to="us-gaap_Goodwill_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillMember" xlink:label="us-gaap_GoodwillMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GoodwillMember_lbl" xml:lang="en-US" id="id_10699837_2031371_1_1">Goodwill [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GoodwillMember_lbl" xml:lang="en-US" id="id_10699837_2031371_2_1">Goodwill [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillMember" xlink:to="us-gaap_GoodwillMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_GuaranteeExpirationYear" xlink:label="aa_GuaranteeExpirationYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_GuaranteeExpirationYear_lbl" xml:lang="en-US" id="id_10699837_2052928_3_1">Guarantee expiration year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_GuaranteeExpirationYear_lbl" xml:lang="en-US" id="id_10699837_2052928_1_1">Guarantee Expiration Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_GuaranteeExpirationYear_lbl" xml:lang="en-US" id="id_10699837_2052928_2_1">Guarantee debt service expiration year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_GuaranteeExpirationYear" xlink:to="aa_GuaranteeExpirationYear_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_GuaranteeObligationPercentage" xlink:label="aa_GuaranteeObligationPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_GuaranteeObligationPercentage_lbl" xml:lang="en-US" id="id_10699837_2043063_3_1">Guarantee Obligation Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_GuaranteeObligationPercentage_lbl" xml:lang="en-US" id="id_10699837_2043063_1_1">Guarantee Obligation Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_GuaranteeObligationPercentage_lbl" xml:lang="en-US" id="id_10699837_2043063_2_1">Percentage of amount required to be contributed in the event Alcoa would be required to make payments under the guarantees</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_GuaranteeObligationPercentage" xlink:to="aa_GuaranteeObligationPercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="us-gaap_GuaranteeObligationsByNatureAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GuaranteeObligationsByNatureAxis_lbl" xml:lang="en-US" id="id_10699837_2025713_1_1">Guarantor Obligations, Nature [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GuaranteeObligationsByNatureAxis_lbl" xml:lang="en-US" id="id_10699837_2025713_2_1">Guarantor Obligations, Nature [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GuaranteeObligationsByNatureAxis" xlink:to="us-gaap_GuaranteeObligationsByNatureAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue" xlink:label="us-gaap_GuaranteeObligationsCurrentCarryingValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GuaranteeObligationsCurrentCarryingValue_lbl" xml:lang="en-US" id="id_10699837_2022890_1_1">Guarantor Obligations, Current Carrying Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GuaranteeObligationsCurrentCarryingValue_lbl" xml:lang="en-US" id="id_10699837_2022890_2_1">Guarantee issued on behalf of smelting and rolling mill companies</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GuaranteeObligationsCurrentCarryingValue" xlink:to="us-gaap_GuaranteeObligationsCurrentCarryingValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="us-gaap_GuaranteeObligationsNatureDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GuaranteeObligationsNatureDomain_lbl" xml:lang="en-US" id="id_10699837_2033865_1_1">Guarantor Obligations, Nature [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GuaranteeObligationsNatureDomain_lbl" xml:lang="en-US" id="id_10699837_2033865_2_1">Guarantor Obligations, Nature [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GuaranteeObligationsNatureDomain" xlink:to="us-gaap_GuaranteeObligationsNatureDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="us-gaap_HedgingDesignationAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_HedgingDesignationAxis_lbl" xml:lang="en-US" id="id_10699837_2034079_1_1">Hedging Designation [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_HedgingDesignationAxis_lbl" xml:lang="en-US" id="id_10699837_2034079_2_1">Hedging Designation [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_HedgingDesignationAxis" xlink:to="us-gaap_HedgingDesignationAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="us-gaap_HedgingDesignationDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_HedgingDesignationDomain_lbl" xml:lang="en-US" id="id_10699837_2030907_1_1">Hedging Designation [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_HedgingDesignationDomain_lbl" xml:lang="en-US" id="id_10699837_2030907_2_1">Hedging Designation [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_HedgingDesignationDomain" xlink:to="us-gaap_HedgingDesignationDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingRelationshipDomain" xlink:label="us-gaap_HedgingRelationshipDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_HedgingRelationshipDomain_lbl" xml:lang="en-US" id="id_10699837_2029426_1_1">Hedging Relationship [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_HedgingRelationshipDomain_lbl" xml:lang="en-US" id="id_10699837_2029426_2_1">Hedging Relationship [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_HedgingRelationshipDomain" xlink:to="us-gaap_HedgingRelationshipDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd#stpr_IN" xlink:label="stpr_IN"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="stpr_IN_lbl" xml:lang="en-US" id="id_10699837_2030722_1_1">INDIANA</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="stpr_IN_lbl" xml:lang="en-US" id="id_10699837_2030722_2_1">Warrick, IN Smelter [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="stpr_IN" xlink:to="stpr_IN_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_lbl" xml:lang="en-US" id="id_10699837_2032243_1_1">Income Amounts Attributable to Parent, Disclosures [Abstract]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxAuthorityDomain" xlink:to="us-gaap_IncomeTaxAuthorityDomain_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_IncomeTaxExaminationAssessmentOutstanding_lbl" xml:lang="en-US" id="id_10699837_2329328_3_1">Income tax examination assessment outstanding.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_IncomeTaxExaminationAssessmentOutstanding_lbl" xml:lang="en-US" id="id_10699837_2329328_1_1">Income Tax Examination Assessment Outstanding</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss_lbl" xml:lang="en-US" id="id_10699837_2031397_1_1">Income Tax Examination, Estimate of Possible Loss</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_10699837_2034285_2_1">Income tax expense</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableTrade_lbl" xml:lang="en-US" id="id_10699837_2029646_1_1">Increase (Decrease) in Accounts Payable, Trade</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xml:lang="en-US" id="id_10699837_2029195_1_1">Increase (Decrease) in Accrued Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xml:lang="en-US" id="id_10699837_2029195_2_1">(Decrease) in accrued expenses</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInReceivables" xlink:to="us-gaap_IncreaseDecreaseInReceivables_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInRestrictedCash" xlink:label="us-gaap_IncreaseDecreaseInRestrictedCash"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInRestrictedCash_lbl" xml:lang="en-US" id="id_10699837_2034878_1_1">Increase (Decrease) in Restricted Cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInRestrictedCash_lbl" xml:lang="en-US" id="id_10699837_2034878_14_1">Net change in restricted cash</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInRestrictedCash" xlink:to="us-gaap_IncreaseDecreaseInRestrictedCash_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities" xlink:label="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_lbl" xml:lang="en-US" id="id_10699837_2033894_1_1">Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_lbl" xml:lang="en-US" id="id_10699837_2033894_2_1">Convertible notes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities" xlink:to="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_IncrementalCommonSharesAttributableToMandatoryConvertiblePreferredStockDividends" xlink:label="aa_IncrementalCommonSharesAttributableToMandatoryConvertiblePreferredStockDividends"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_IncrementalCommonSharesAttributableToMandatoryConvertiblePreferredStockDividends_lbl" xml:lang="en-US" id="id_10699837_2324654_3_1">Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of mandatory convertible preferred stock dividends.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_IncrementalCommonSharesAttributableToMandatoryConvertiblePreferredStockDividends_lbl" xml:lang="en-US" id="id_10699837_2324654_1_1">Incremental Common Shares Attributable To Mandatory Convertible Preferred Stock Dividends</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_IncrementalCommonSharesAttributableToMandatoryConvertiblePreferredStockDividends_lbl" xml:lang="en-US" id="id_10699837_2324654_2_1">Mandatory convertible preferred stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_IncrementalCommonSharesAttributableToMandatoryConvertiblePreferredStockDividends" xlink:to="aa_IncrementalCommonSharesAttributableToMandatoryConvertiblePreferredStockDividends_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends" xlink:label="us-gaap_IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends_lbl" xml:lang="en-US" id="id_10699837_2028103_1_1">Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends_lbl" xml:lang="en-US" id="id_10699837_2028103_2_1">Stock and performance awards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends" xlink:to="us-gaap_IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl" xml:lang="en-US" id="id_10699837_2032261_1_1">Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl" xml:lang="en-US" id="id_10699837_2032261_2_1">Stock options</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:to="us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_IntangibleAssetsMember" xlink:label="aa_IntangibleAssetsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_IntangibleAssetsMember_lbl" xml:lang="en-US" id="id_10699837_2059399_3_1">Intangible Assets [Member].</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_IntangibleAssetsMember_lbl" xml:lang="en-US" id="id_10699837_2059399_1_1">Intangible Assets [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_IntangibleAssetsMember_lbl" xml:lang="en-US" id="id_10699837_2059399_2_1">Intangible Assets [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_IntangibleAssetsMember" xlink:to="aa_IntangibleAssetsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US" id="id_10699837_2030293_1_1">Interest Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US" id="id_10699837_2030293_2_1">Interest expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US" id="id_10699837_2030293_14_1">Interest expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestOnConvertibleDebtNetOfTax" xlink:label="us-gaap_InterestOnConvertibleDebtNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestOnConvertibleDebtNetOfTax_lbl" xml:lang="en-US" id="id_10699837_2032031_1_1">Interest on Convertible Debt, Net of Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestOnConvertibleDebtNetOfTax_lbl" xml:lang="en-US" id="id_10699837_2032031_2_1">Add: interest expense related to convertible notes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestOnConvertibleDebtNetOfTax" xlink:to="us-gaap_InterestOnConvertibleDebtNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestRateContractMember" xlink:label="us-gaap_InterestRateContractMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestRateContractMember_lbl" xml:lang="en-US" id="id_10699837_2030944_1_1">Interest Rate Contract [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestRateContractMember_lbl" xml:lang="en-US" id="id_10699837_2030944_2_1">Interest Rate Contracts [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestRateContractMember" xlink:to="us-gaap_InterestRateContractMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_InterrelationshipOfFutureAluminumAndOilPricesMember" xlink:label="aa_InterrelationshipOfFutureAluminumAndOilPricesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_InterrelationshipOfFutureAluminumAndOilPricesMember_lbl" xml:lang="en-US" id="id_10699837_2372840_3_1">Interrelationship of future aluminum and oil prices.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_InterrelationshipOfFutureAluminumAndOilPricesMember_lbl" xml:lang="en-US" id="id_10699837_2372840_1_1">Interrelationship Of Future Aluminum And Oil Prices [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_InterrelationshipOfFutureAluminumAndOilPricesMember_lbl" xml:lang="en-US" id="id_10699837_2372840_2_1">Interrelationship of Future Aluminum and Oil Prices [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_InterrelationshipOfFutureAluminumAndOilPricesMember" xlink:to="aa_InterrelationshipOfFutureAluminumAndOilPricesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_InterrelationshipOfFutureAluminumPricesForeignCurrencyExchangeRatesAndUSConsumerPriceIndexMember" xlink:label="aa_InterrelationshipOfFutureAluminumPricesForeignCurrencyExchangeRatesAndUSConsumerPriceIndexMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_InterrelationshipOfFutureAluminumPricesForeignCurrencyExchangeRatesAndUSConsumerPriceIndexMember_lbl" xml:lang="en-US" id="id_10699837_2365598_3_1">Interrelationship of future aluminum prices, foreign currency exchange rates, and US consumer price index.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_InterrelationshipOfFutureAluminumPricesForeignCurrencyExchangeRatesAndUSConsumerPriceIndexMember_lbl" xml:lang="en-US" id="id_10699837_2365598_1_1">Interrelationship Of Future Aluminum Prices, Foreign Currency Exchange Rates, And US Consumer Price Index [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_InterrelationshipOfFutureAluminumPricesForeignCurrencyExchangeRatesAndUSConsumerPriceIndexMember_lbl" xml:lang="en-US" id="id_10699837_2365598_2_1">Interrelationship of Future Aluminum Prices, Foreign Currency Exchange Rates, and U.S. Consumer Price Index [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_InterrelationshipOfFutureAluminumPricesForeignCurrencyExchangeRatesAndUSConsumerPriceIndexMember" xlink:to="aa_InterrelationshipOfFutureAluminumPricesForeignCurrencyExchangeRatesAndUSConsumerPriceIndexMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_InterrelationshipOfLondonMetalExchangePriceToAmountOfMegawattHoursOfEnergyNeededToProduceForecastedMetricTonsOfAluminumMember" xlink:label="aa_InterrelationshipOfLondonMetalExchangePriceToAmountOfMegawattHoursOfEnergyNeededToProduceForecastedMetricTonsOfAluminumMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_InterrelationshipOfLondonMetalExchangePriceToAmountOfMegawattHoursOfEnergyNeededToProduceForecastedMetricTonsOfAluminumMember_lbl" xml:lang="en-US" id="id_10699837_2392860_3_1">Interrelationship of london metal exchange price to amount of megawatt hours of energy needed to produce forecasted metric tons of aluminum.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_InterrelationshipOfLondonMetalExchangePriceToAmountOfMegawattHoursOfEnergyNeededToProduceForecastedMetricTonsOfAluminumMember_lbl" xml:lang="en-US" id="id_10699837_2392860_1_1">Interrelationship Of London Metal Exchange Price To Amount Of Megawatt Hours Of Energy Needed To Produce Forecasted Metric Tons Of Aluminum [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_InterrelationshipOfLondonMetalExchangePriceToAmountOfMegawattHoursOfEnergyNeededToProduceForecastedMetricTonsOfAluminumMember_lbl" xml:lang="en-US" id="id_10699837_2392860_2_1">Interrelationship of London Metal Exchange Price to Amount Of Megawatt Hours of Energy Needed to Produce Forecasted Metric Tons of Aluminum [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_InterrelationshipOfLondonMetalExchangePriceToAmountOfMegawattHoursOfEnergyNeededToProduceForecastedMetricTonsOfAluminumMember" xlink:to="aa_InterrelationshipOfLondonMetalExchangePriceToAmountOfMegawattHoursOfEnergyNeededToProduceForecastedMetricTonsOfAluminumMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_InterrelationshipOfLondonMetalExchangePriceToOverallEnergyPriceMember" xlink:label="aa_InterrelationshipOfLondonMetalExchangePriceToOverallEnergyPriceMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_InterrelationshipOfLondonMetalExchangePriceToOverallEnergyPriceMember_lbl" xml:lang="en-US" id="id_10699837_2126574_3_1">Interrelationship of London metal exchange price to overall energy price.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_InterrelationshipOfLondonMetalExchangePriceToOverallEnergyPriceMember_lbl" xml:lang="en-US" id="id_10699837_2126574_1_1">Interrelationship of London Metal Exchange Price to Overall Energy Price [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_InterrelationshipOfLondonMetalExchangePriceToOverallEnergyPriceMember_lbl" xml:lang="en-US" id="id_10699837_2126574_2_1">Interrelationship of LME Price to Overall Energy Price [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_InterrelationshipOfLondonMetalExchangePriceToOverallEnergyPriceMember" xlink:to="aa_InterrelationshipOfLondonMetalExchangePriceToOverallEnergyPriceMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IntersegmentEliminationMember" xlink:label="us-gaap_IntersegmentEliminationMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IntersegmentEliminationMember_lbl" xml:lang="en-US" id="id_10699837_2031589_1_1">Intersegment Eliminations [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IntersegmentEliminationMember_lbl" xml:lang="en-US" id="id_10699837_2031589_2_1">Intersegment Eliminations [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntersegmentEliminationMember" xlink:to="us-gaap_IntersegmentEliminationMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="us-gaap_InventoryDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryDisclosureAbstract_lbl" xml:lang="en-US" id="id_10699837_2032275_1_1">Inventory Disclosure [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryDisclosureAbstract_lbl" xml:lang="en-US" id="id_10699837_2032275_2_1">Inventory Disclosure [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryDisclosureAbstract" xlink:to="us-gaap_InventoryDisclosureAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryDisclosureTextBlock" xlink:label="us-gaap_InventoryDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryDisclosureTextBlock_lbl" xml:lang="en-US" id="id_10699837_2028981_1_1">Inventory Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryDisclosureTextBlock_lbl" xml:lang="en-US" id="id_10699837_2028981_2_1">Inventories</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryDisclosureTextBlock" xlink:to="us-gaap_InventoryDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves_lbl" xml:lang="en-US" id="id_10699837_2033123_1_1">Inventory, Finished Goods, Net of Reserves</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves_lbl" xml:lang="en-US" id="id_10699837_2033123_2_1">Finished goods</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:to="us-gaap_InventoryFinishedGoodsNetOfReserves_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryLIFOReserve" xlink:label="us-gaap_InventoryLIFOReserve"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryLIFOReserve_lbl" xml:lang="en-US" id="id_10699837_2029669_1_1">Inventory, LIFO Reserve</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryLIFOReserve_lbl" xml:lang="en-US" id="id_10699837_2029669_2_1">Total inventories valued on an average-cost basis</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryLIFOReserve" xlink:to="us-gaap_InventoryLIFOReserve_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryNet_lbl" xml:lang="en-US" id="id_10699837_2030508_1_1">Inventory, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryNet_lbl" xml:lang="en-US" id="id_10699837_2030508_2_1">Inventories (F)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_InventoryNet_lbl" xml:lang="en-US" id="id_10699837_2030508_6_1">Inventories, total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="us-gaap_InventoryRawMaterialsNetOfReserves"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryRawMaterialsNetOfReserves_lbl" xml:lang="en-US" id="id_10699837_2028125_1_1">Inventory, Raw Materials, Net of Reserves</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryRawMaterialsNetOfReserves_lbl" xml:lang="en-US" id="id_10699837_2028125_2_1">Purchased raw materials</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryRawMaterialsNetOfReserves" xlink:to="us-gaap_InventoryRawMaterialsNetOfReserves_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventorySuppliesNetOfReserves" xlink:label="us-gaap_InventorySuppliesNetOfReserves"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventorySuppliesNetOfReserves_lbl" xml:lang="en-US" id="id_10699837_2033125_1_1">Inventory, Supplies, Net of Reserves</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventorySuppliesNetOfReserves_lbl" xml:lang="en-US" id="id_10699837_2033125_2_1">Operating supplies</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventorySuppliesNetOfReserves" xlink:to="us-gaap_InventorySuppliesNetOfReserves_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves" xlink:label="us-gaap_InventoryWorkInProcessNetOfReserves"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryWorkInProcessNetOfReserves_lbl" xml:lang="en-US" id="id_10699837_2034310_1_1">Inventory, Work in Process, Net of Reserves</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryWorkInProcessNetOfReserves_lbl" xml:lang="en-US" id="id_10699837_2034310_2_1">Work-in-process</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryWorkInProcessNetOfReserves" xlink:to="us-gaap_InventoryWorkInProcessNetOfReserves_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryWriteDown" xlink:label="us-gaap_InventoryWriteDown"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryWriteDown_lbl" xml:lang="en-US" id="id_10699837_2030754_1_1">Inventory Write-down</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryWriteDown_lbl" xml:lang="en-US" id="id_10699837_2030754_2_1">Inventory write down</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryWriteDown" xlink:to="us-gaap_InventoryWriteDown_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_InventoryWriteDownAfterTaxAndNonControllingInterests" xlink:label="aa_InventoryWriteDownAfterTaxAndNonControllingInterests"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_InventoryWriteDownAfterTaxAndNonControllingInterests_lbl" xml:lang="en-US" id="id_10699837_2245446_3_1">Inventory write down, after tax and non-controlling interests.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_InventoryWriteDownAfterTaxAndNonControllingInterests_lbl" xml:lang="en-US" id="id_10699837_2245446_1_1">Inventory Write Down After Tax And Non Controlling Interests</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_InventoryWriteDownAfterTaxAndNonControllingInterests_lbl" xml:lang="en-US" id="id_10699837_2245446_2_1">Inventory write down after tax and noncontrolling interests</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_InventoryWriteDownAfterTaxAndNonControllingInterests" xlink:to="aa_InventoryWriteDownAfterTaxAndNonControllingInterests_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentAxis" xlink:label="invest_InvestmentAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="invest_InvestmentAxis_lbl" xml:lang="en-US" id="id_10699837_2030755_1_1">Investment [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="invest_InvestmentAxis_lbl" xml:lang="en-US" id="id_10699837_2030755_2_1">Investment [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="invest_InvestmentAxis" xlink:to="invest_InvestmentAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentDomain" xlink:label="invest_InvestmentDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="invest_InvestmentDomain_lbl" xml:lang="en-US" id="id_10699837_2028983_1_1">Investment [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="invest_InvestmentDomain_lbl" xml:lang="en-US" id="id_10699837_2028983_2_1">Investment [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="invest_InvestmentDomain" xlink:to="invest_InvestmentDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="us-gaap_InvestmentIncomeInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xml:lang="en-US" id="id_10699837_2033310_1_1">Investment Income, Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xml:lang="en-US" id="id_10699837_2033310_14_1">Interest income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeInterest" xlink:to="us-gaap_InvestmentIncomeInterest_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_InvestmentPercentage" xlink:label="aa_InvestmentPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_InvestmentPercentage_lbl" xml:lang="en-US" id="id_10699837_2107516_3_1">Investment percentage.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_InvestmentPercentage_lbl" xml:lang="en-US" id="id_10699837_2107516_1_1">Investment Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_InvestmentPercentage_lbl" xml:lang="en-US" id="id_10699837_2107516_2_1">Investment percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="aa_InvestmentPercentage_lbl" xml:lang="en-US" id="id_10699837_2107516_12_1">Percentage of access to be maintained in DBNGP transmission capacity for gas supply</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_InvestmentPercentage" xlink:to="aa_InvestmentPercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentsScheduleAbstract" xlink:label="invest_InvestmentsScheduleAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="invest_InvestmentsScheduleAbstract_lbl" xml:lang="en-US" id="id_10699837_2031169_1_1">Investments Schedule [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="invest_InvestmentsScheduleAbstract_lbl" xml:lang="en-US" id="id_10699837_2031169_2_1">Investments Schedule [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="invest_InvestmentsScheduleAbstract" xlink:to="invest_InvestmentsScheduleAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentTextBlock" xlink:label="invest_InvestmentTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="invest_InvestmentTextBlock_lbl" xml:lang="en-US" id="id_10699837_2029233_1_1">Investment [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="invest_InvestmentTextBlock_lbl" xml:lang="en-US" id="id_10699837_2029233_2_1">Investments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="invest_InvestmentTextBlock" xlink:to="invest_InvestmentTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ItalianMinistryOfEnvironmentAndProtectionOfLandAndSeaMember" xlink:label="aa_ItalianMinistryOfEnvironmentAndProtectionOfLandAndSeaMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ItalianMinistryOfEnvironmentAndProtectionOfLandAndSeaMember_lbl" xml:lang="en-US" id="id_10699837_2238448_3_1">Italian ministry of environment and protection of land and sea.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ItalianMinistryOfEnvironmentAndProtectionOfLandAndSeaMember_lbl" xml:lang="en-US" id="id_10699837_2238448_1_1">Italian Ministry of Environment and Protection of Land and Sea[Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ItalianMinistryOfEnvironmentAndProtectionOfLandAndSeaMember_lbl" xml:lang="en-US" id="id_10699837_2238448_2_1">Italian Ministry of Environment and Protection of Land and Sea[Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ItalianMinistryOfEnvironmentAndProtectionOfLandAndSeaMember" xlink:to="aa_ItalianMinistryOfEnvironmentAndProtectionOfLandAndSeaMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_LegalEntityAxis_lbl" xml:lang="en-US" id="id_10699837_2033330_1_1">Legal Entity [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_LegalEntityAxis_lbl" xml:lang="en-US" id="id_10699837_2033330_2_1">Legal Entity [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LegalEntityAxis" xlink:to="dei_LegalEntityAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US" id="id_10699837_2031177_1_1">Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US" id="id_10699837_2031177_6_1">Total liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesAbstract" xlink:label="us-gaap_LiabilitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xml:lang="en-US" id="id_10699837_2033555_1_1">Liabilities [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xml:lang="en-US" id="id_10699837_2033555_2_1">LIABILITIES</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_LiabilitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US" id="id_10699837_2031178_1_1">Liabilities and Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US" id="id_10699837_2031178_6_1">Total liabilities and equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US" id="id_10699837_2031608_1_1">Liabilities, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US" id="id_10699837_2031608_6_1">Total current liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US" id="id_10699837_2028362_1_1">Liabilities, Current [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US" id="id_10699837_2028362_2_1">Current liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LIFOInventoryAmount" xlink:label="us-gaap_LIFOInventoryAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LIFOInventoryAmount_lbl" xml:lang="en-US" id="id_10699837_2040954_1_1">LIFO Inventory Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LIFOInventoryAmount_lbl" xml:lang="en-US" id="id_10699837_2040954_2_1">Inventories valued on a LIFO basis</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LIFOInventoryAmount" xlink:to="us-gaap_LIFOInventoryAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_LigestraMember" xlink:label="aa_LigestraMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_LigestraMember_lbl" xml:lang="en-US" id="id_10699837_2237139_3_1">Ligestra.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_LigestraMember_lbl" xml:lang="en-US" id="id_10699837_2237139_1_1">Ligestra [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_LigestraMember_lbl" xml:lang="en-US" id="id_10699837_2237139_2_1">Ligestra [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_LigestraMember" xlink:to="aa_LigestraMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_LisiMedicalMember" xlink:label="aa_LisiMedicalMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_LisiMedicalMember_lbl" xml:lang="en-US" id="id_10699837_2392019_3_1">LISI MEDICAL.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_LisiMedicalMember_lbl" xml:lang="en-US" id="id_10699837_2392019_1_1">LISI MEDICAL [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_LisiMedicalMember_lbl" xml:lang="en-US" id="id_10699837_2392019_2_1">LISI MEDICAL [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_LisiMedicalMember" xlink:to="aa_LisiMedicalMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl" xml:lang="en-US" id="id_10699837_2034353_1_1">Long-term Debt and Capital Lease Obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl" xml:lang="en-US" id="id_10699837_2034353_2_1">Long-term debt, less amount due within one year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:to="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_lbl" xml:lang="en-US" id="id_10699837_2032725_1_1">Long-term Debt and Capital Lease Obligations, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_lbl" xml:lang="en-US" id="id_10699837_2032725_2_1">Long-term debt due within one year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:to="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtFairValue" xlink:label="us-gaap_LongTermDebtFairValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtFairValue_lbl" xml:lang="en-US" id="id_10699837_2033178_1_1">Long-term Debt, Fair Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtFairValue_lbl" xml:lang="en-US" id="id_10699837_2033178_2_1">Long-term debt, less amount due within one year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtFairValue" xlink:to="us-gaap_LongTermDebtFairValue_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermInvestments_lbl" xml:lang="en-US" id="id_10699837_2033595_1_1">Long-term Investments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermInvestments_lbl" xml:lang="en-US" id="id_10699837_2033595_2_1">Investments (G)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermInvestments" xlink:to="us-gaap_LongTermInvestments_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermPurchaseCommitmentAmount" xlink:label="us-gaap_LongTermPurchaseCommitmentAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermPurchaseCommitmentAmount_lbl" xml:lang="en-US" id="id_10699837_2032926_1_1">Long-term Purchase Commitment, Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermPurchaseCommitmentAmount_lbl" xml:lang="en-US" id="id_10699837_2032926_2_1">Required plan contributions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermPurchaseCommitmentAmount" xlink:to="us-gaap_LongTermPurchaseCommitmentAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermPurchaseCommitmentPeriod" xlink:label="us-gaap_LongtermPurchaseCommitmentPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongtermPurchaseCommitmentPeriod_lbl" xml:lang="en-US" id="id_10699837_2032079_1_1">Long-term Purchase Commitment, Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongtermPurchaseCommitmentPeriod_lbl" xml:lang="en-US" id="id_10699837_2032079_2_1">Gas supply agreement period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermPurchaseCommitmentPeriod" xlink:to="us-gaap_LongtermPurchaseCommitmentPeriod_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xml:lang="en-US" id="id_10699837_2032333_1_1">Loss Contingency Nature [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xml:lang="en-US" id="id_10699837_2032333_2_1">Loss Contingency Nature [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:to="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="us-gaap_LossContingenciesLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xml:lang="en-US" id="id_10699837_2033181_1_1">Loss Contingencies [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xml:lang="en-US" id="id_10699837_2033181_2_1">Loss Contingencies [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesLineItems" xlink:to="us-gaap_LossContingenciesLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingenciesTable" xlink:label="us-gaap_LossContingenciesTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LossContingenciesTable_lbl" xml:lang="en-US" id="id_10699837_2030134_1_1">Loss Contingencies [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LossContingenciesTable_lbl" xml:lang="en-US" id="id_10699837_2030134_2_1">Loss Contingencies [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesTable" xlink:to="us-gaap_LossContingenciesTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyEstimateOfPossibleLoss" xlink:label="us-gaap_LossContingencyEstimateOfPossibleLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LossContingencyEstimateOfPossibleLoss_lbl" xml:lang="en-US" id="id_10699837_2030135_1_1">Loss Contingency, Estimate of Possible Loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LossContingencyEstimateOfPossibleLoss_lbl" xml:lang="en-US" id="id_10699837_2030135_2_1">Management estimate for maximum exposure from class action</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingencyEstimateOfPossibleLoss" xlink:to="us-gaap_LossContingencyEstimateOfPossibleLoss_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="us-gaap_LossContingencyNatureDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xml:lang="en-US" id="id_10699837_2028170_1_1">Loss Contingency, Nature [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xml:lang="en-US" id="id_10699837_2028170_2_1">Loss Contingency, Nature [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingencyNatureDomain" xlink:to="us-gaap_LossContingencyNatureDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MaadenAlcoaJointVentureMember" xlink:label="aa_MaadenAlcoaJointVentureMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MaadenAlcoaJointVentureMember_lbl" xml:lang="en-US" id="id_10699837_2163566_3_1">Maaden Alcoa Joint Venture [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MaadenAlcoaJointVentureMember_lbl" xml:lang="en-US" id="id_10699837_2163566_1_1">Maaden Alcoa Joint Venture [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MaadenAlcoaJointVentureMember_lbl" xml:lang="en-US" id="id_10699837_2163566_2_1">Maaden Alcoa Joint Venture [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MaadenAlcoaJointVentureMember" xlink:to="aa_MaadenAlcoaJointVentureMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MaadenAlcoaJointVentureMineAndRefineryCompanyMember" xlink:label="aa_MaadenAlcoaJointVentureMineAndRefineryCompanyMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MaadenAlcoaJointVentureMineAndRefineryCompanyMember_lbl" xml:lang="en-US" id="id_10699837_2373781_3_1">Maaden Alcoa Joint Venture Mine And Refinery Company [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MaadenAlcoaJointVentureMineAndRefineryCompanyMember_lbl" xml:lang="en-US" id="id_10699837_2373781_1_1">Maaden Alcoa Joint Venture Mine And Refinery Company [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MaadenAlcoaJointVentureMineAndRefineryCompanyMember_lbl" xml:lang="en-US" id="id_10699837_2373781_2_1">Maaden Alcoa Joint Venture Mine And Refinery Company [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MaadenAlcoaJointVentureMineAndRefineryCompanyMember" xlink:to="aa_MaadenAlcoaJointVentureMineAndRefineryCompanyMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MaadenAlcoaJointVentureSmelterAndRollingMillCompaniesMember" xlink:label="aa_MaadenAlcoaJointVentureSmelterAndRollingMillCompaniesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MaadenAlcoaJointVentureSmelterAndRollingMillCompaniesMember_lbl" xml:lang="en-US" id="id_10699837_2051876_3_1">Maaden Alcoa Joint Venture Smelter And Rolling Mill Companies [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MaadenAlcoaJointVentureSmelterAndRollingMillCompaniesMember_lbl" xml:lang="en-US" id="id_10699837_2051876_1_1">Maaden Alcoa Joint Venture Smelter And Rolling Mill Companies [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MaadenAlcoaJointVentureSmelterAndRollingMillCompaniesMember_lbl" xml:lang="en-US" id="id_10699837_2051876_2_1">Maaden Alcoa Joint Venture Smelter And Rolling Mill Companies [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MaadenAlcoaJointVentureSmelterAndRollingMillCompaniesMember" xlink:to="aa_MaadenAlcoaJointVentureSmelterAndRollingMillCompaniesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MaadenJointVentureMember" xlink:label="aa_MaadenJointVentureMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MaadenJointVentureMember_lbl" xml:lang="en-US" id="id_10699837_2113359_3_1">Ma'aden joint venture.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MaadenJointVentureMember_lbl" xml:lang="en-US" id="id_10699837_2113359_1_1">Maaden Joint Venture [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MaadenJointVentureMember_lbl" xml:lang="en-US" id="id_10699837_2113359_2_1">Ma'aden Joint Venture [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MaadenJointVentureMember" xlink:to="aa_MaadenJointVentureMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MajorityProjectFundingExpectedSpentYear" xlink:label="aa_MajorityProjectFundingExpectedSpentYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MajorityProjectFundingExpectedSpentYear_lbl" xml:lang="en-US" id="id_10699837_2245895_3_1">Majority project funding expected spent year.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MajorityProjectFundingExpectedSpentYear_lbl" xml:lang="en-US" id="id_10699837_2245895_1_1">Majority Project Funding Expected Spent Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MajorityProjectFundingExpectedSpentYear_lbl" xml:lang="en-US" id="id_10699837_2245895_2_1">Majority of the project funding period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MajorityProjectFundingExpectedSpentYear" xlink:to="aa_MajorityProjectFundingExpectedSpentYear_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_lbl" xml:lang="en-US" id="id_10699837_2031210_1_1">Major Types of Debt and Equity Securities [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_lbl" xml:lang="en-US" id="id_10699837_2031210_2_1">Major Types of Debt and Equity Securities [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:to="us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_lbl" xml:lang="en-US" id="id_10699837_2030355_1_1">Major Types of Debt and Equity Securities [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_lbl" xml:lang="en-US" id="id_10699837_2030355_2_1">Major Types of Debt and Equity Securities [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:to="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MandatorilyRedeemableConvertiblePreferredStock" xlink:label="aa_MandatorilyRedeemableConvertiblePreferredStock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MandatorilyRedeemableConvertiblePreferredStock_lbl" xml:lang="en-US" id="id_10699837_2102657_3_1">Mandatorily redeemable convertible preferred stock.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MandatorilyRedeemableConvertiblePreferredStock_lbl" xml:lang="en-US" id="id_10699837_2102657_1_1">Mandatorily Redeemable Convertible Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MandatorilyRedeemableConvertiblePreferredStock_lbl" xml:lang="en-US" id="id_10699837_2102657_2_1">Mandatory convertible preferred stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MandatorilyRedeemableConvertiblePreferredStock" xlink:to="aa_MandatorilyRedeemableConvertiblePreferredStock_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MandatoryConvertibleNotesMember" xlink:label="aa_MandatoryConvertibleNotesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MandatoryConvertibleNotesMember_lbl" xml:lang="en-US" id="id_10699837_2126117_3_1">Mandatory Convertible Notes [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MandatoryConvertibleNotesMember_lbl" xml:lang="en-US" id="id_10699837_2126117_1_1">Mandatory Convertible Notes [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MandatoryConvertibleNotesMember_lbl" xml:lang="en-US" id="id_10699837_2126117_2_1">Mandatory Convertible Notes [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MandatoryConvertibleNotesMember" xlink:to="aa_MandatoryConvertibleNotesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MandatoryConvertiblePreferredStockMember" xlink:label="aa_MandatoryConvertiblePreferredStockMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MandatoryConvertiblePreferredStockMember_lbl" xml:lang="en-US" id="id_10699837_2116362_3_1">Mandatory Convertible Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MandatoryConvertiblePreferredStockMember_lbl" xml:lang="en-US" id="id_10699837_2116362_1_1">Mandatory Convertible Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MandatoryConvertiblePreferredStockMember_lbl" xml:lang="en-US" id="id_10699837_2116362_2_1">Mandatory Convertible Preferred Stock [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MandatoryConvertiblePreferredStockMember" xlink:to="aa_MandatoryConvertiblePreferredStockMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MarketRiskPremiumMember" xlink:label="aa_MarketRiskPremiumMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MarketRiskPremiumMember_lbl" xml:lang="en-US" id="id_10699837_2167063_3_1">Market Risk Premium [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MarketRiskPremiumMember_lbl" xml:lang="en-US" id="id_10699837_2167063_1_1">Market Risk Premium [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MarketRiskPremiumMember_lbl" xml:lang="en-US" id="id_10699837_2167063_2_1">Midwest Premium</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MarketRiskPremiumMember" xlink:to="aa_MarketRiskPremiumMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MassenaNyMember" xlink:label="aa_MassenaNyMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MassenaNyMember_lbl" xml:lang="en-US" id="id_10699837_2289304_3_1">Massena, NY.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MassenaNyMember_lbl" xml:lang="en-US" id="id_10699837_2289304_1_1">Massena NY [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MassenaNyMember_lbl" xml:lang="en-US" id="id_10699837_2289304_2_1">Massena West, NY [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MassenaNyMember" xlink:to="aa_MassenaNyMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaterialReconcilingItemsMember" xlink:label="us-gaap_MaterialReconcilingItemsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MaterialReconcilingItemsMember_lbl" xml:lang="en-US" id="id_10699837_2031004_1_1">Segment Reconciling Items [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MaterialReconcilingItemsMember_lbl" xml:lang="en-US" id="id_10699837_2031004_2_1">Other [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MaterialReconcilingItemsMember" xlink:to="us-gaap_MaterialReconcilingItemsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MaturityDataOfFutureOilPrice" xlink:label="aa_MaturityDataOfFutureOilPrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MaturityDataOfFutureOilPrice_lbl" xml:lang="en-US" id="id_10699837_2205782_3_1">Maturity data of future oil price.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MaturityDataOfFutureOilPrice_lbl" xml:lang="en-US" id="id_10699837_2205782_1_1">Maturity Data Of Future Oil Price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MaturityDataOfFutureOilPrice_lbl" xml:lang="en-US" id="id_10699837_2205782_2_1">Maturity year of future oil price</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MaturityDataOfFutureOilPrice" xlink:to="aa_MaturityDataOfFutureOilPrice_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MaturityDateOfElectricityBeyondForwardCurve" xlink:label="aa_MaturityDateOfElectricityBeyondForwardCurve"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MaturityDateOfElectricityBeyondForwardCurve_lbl" xml:lang="en-US" id="id_10699837_2152040_3_1">Maturity date of electricity beyond forward curve.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MaturityDateOfElectricityBeyondForwardCurve_lbl" xml:lang="en-US" id="id_10699837_2152040_1_1">Maturity Date Of Electricity Beyond Forward Curve</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MaturityDateOfElectricityBeyondForwardCurve_lbl" xml:lang="en-US" id="id_10699837_2152040_2_1">Maturity date of electricity beyond forward curve</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MaturityDateOfElectricityBeyondForwardCurve" xlink:to="aa_MaturityDateOfElectricityBeyondForwardCurve_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MaturityDateOfFutureAluminumPrice" xlink:label="aa_MaturityDateOfFutureAluminumPrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MaturityDateOfFutureAluminumPrice_lbl" xml:lang="en-US" id="id_10699837_2319811_3_1">Maturity data of future aluminum price.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MaturityDateOfFutureAluminumPrice_lbl" xml:lang="en-US" id="id_10699837_2319811_1_1">Maturity Date Of Future Aluminum Price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MaturityDateOfFutureAluminumPrice_lbl" xml:lang="en-US" id="id_10699837_2319811_2_1">Maturity year of future aluminum price</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MaturityDateOfFutureAluminumPrice" xlink:to="aa_MaturityDateOfFutureAluminumPrice_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MaximumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod" xlink:label="aa_MaximumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MaximumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod_lbl" xml:lang="en-US" id="id_10699837_2152608_3_1">The maximum amount of cash payments expected to be paid beyond the end of the current annual period related to restructuring charges such as ongoing site remediation work, special termination benefit payments, least termination costs, among others.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MaximumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod_lbl" xml:lang="en-US" id="id_10699837_2152608_1_1">Maximum Amount Of Cash Payments Expected To Be Paid Beyond Current Annual Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MaximumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod_lbl" xml:lang="en-US" id="id_10699837_2152608_2_1">Maximum amount of cash payments expected to be paid beyond the end of the current annual period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MaximumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod" xlink:to="aa_MaximumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="us-gaap_MaximumMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MaximumMember_lbl" xml:lang="en-US" id="id_10699837_2033371_1_1">Maximum [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MaximumMember_lbl" xml:lang="en-US" id="id_10699837_2033371_2_1">Maximum [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MaximumMember" xlink:to="us-gaap_MaximumMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MergersAcquisitionsAndDispositionsDisclosuresTextBlock" xlink:label="us-gaap_MergersAcquisitionsAndDispositionsDisclosuresTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MergersAcquisitionsAndDispositionsDisclosuresTextBlock_lbl" xml:lang="en-US" id="id_10699837_2034727_1_1">Mergers, Acquisitions and Dispositions Disclosures [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MergersAcquisitionsAndDispositionsDisclosuresTextBlock_lbl" xml:lang="en-US" id="id_10699837_2034727_2_1">Acquisitions and Divestitures</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MergersAcquisitionsAndDispositionsDisclosuresTextBlock" xlink:to="us-gaap_MergersAcquisitionsAndDispositionsDisclosuresTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MinimumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod" xlink:label="aa_MinimumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MinimumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod_lbl" xml:lang="en-US" id="id_10699837_2346340_3_1">The minimum amount of cash payments expected to be paid beyond the end of the current annual period related to restructuring charges such as ongoing site remediation work, special termination benefit payments, least termination costs, among others.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MinimumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod_lbl" xml:lang="en-US" id="id_10699837_2346340_1_1">Minimum Amount Of Cash Payments Expected To Be Paid Beyond Current Annual Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MinimumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod_lbl" xml:lang="en-US" id="id_10699837_2346340_2_1">Minimum amount of cash payments expected to be paid beyond the end of the current annual period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MinimumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod" xlink:to="aa_MinimumAmountOfCashPaymentsExpectedToBePaidBeyondCurrentAnnualPeriod_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="us-gaap_MinimumMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinimumMember_lbl" xml:lang="en-US" id="id_10699837_2030148_1_1">Minimum [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MinimumMember_lbl" xml:lang="en-US" id="id_10699837_2030148_2_1">Minimum [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinimumMember" xlink:to="us-gaap_MinimumMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinorityInterest" xlink:label="us-gaap_MinorityInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinorityInterest_lbl" xml:lang="en-US" id="id_10699837_2031641_1_1">Stockholders' Equity Attributable to Noncontrolling Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MinorityInterest_lbl" xml:lang="en-US" id="id_10699837_2031641_2_1">Noncontrolling interests</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterest" xlink:to="us-gaap_MinorityInterest_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:label="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl" xml:lang="en-US" id="id_10699837_2032344_1_1">Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl" xml:lang="en-US" id="id_10699837_2032344_14_1">Distributions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:to="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_MosjoenMember" xlink:label="aa_MosjoenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_MosjoenMember_lbl" xml:lang="en-US" id="id_10699837_2107275_3_1">Mosjoen.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_MosjoenMember_lbl" xml:lang="en-US" id="id_10699837_2107275_1_1">Mosjoen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_MosjoenMember_lbl" xml:lang="en-US" id="id_10699837_2107275_2_1">Mosjoen [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_MosjoenMember" xlink:to="aa_MosjoenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_NetCashFundingReceivedForDevelopmentOfReserves" xlink:label="aa_NetCashFundingReceivedForDevelopmentOfReserves"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_NetCashFundingReceivedForDevelopmentOfReserves_lbl" xml:lang="en-US" id="id_10699837_2392069_3_1">Net cash funding received for development of reserves.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_NetCashFundingReceivedForDevelopmentOfReserves_lbl" xml:lang="en-US" id="id_10699837_2392069_1_1">Net Cash Funding Received For Development Of Reserves</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_NetCashFundingReceivedForDevelopmentOfReserves_lbl" xml:lang="en-US" id="id_10699837_2392069_2_1">Net cash funding received</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_NetCashFundingReceivedForDevelopmentOfReserves" xlink:to="aa_NetCashFundingReceivedForDevelopmentOfReserves_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_10699837_2032942_1_1">Net Cash Provided by (Used in) Financing Activities, Continuing Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_10699837_2032942_6_1">CASH USED FOR FINANCING ACTIVITIES</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_lbl" xml:lang="en-US" id="id_10699837_2033388_1_1">Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_lbl" xml:lang="en-US" id="id_10699837_2033388_2_1">FINANCING ACTIVITIES</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_10699837_2030371_1_1">Net Cash Provided by (Used in) Investing Activities, Continuing Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_10699837_2030371_6_1">CASH PROVIDED FROM (USED FOR) INVESTING ACTIVITIES</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_lbl" xml:lang="en-US" id="id_10699837_2030817_1_1">Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_lbl" xml:lang="en-US" id="id_10699837_2030817_2_1">INVESTING ACTIVITIES</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US" id="id_10699837_2031021_1_1">Net Cash Provided by (Used in) Operating Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US" id="id_10699837_2031021_6_1">CASH (USED FOR) PROVIDED FROM OPERATIONS</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_lbl" xml:lang="en-US" id="id_10699837_2029047_1_1">Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_lbl" xml:lang="en-US" id="id_10699837_2029047_2_1">CASH FROM OPERATIONS</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US" id="id_10699837_2030161_1_1">Net Income (Loss) Attributable to Parent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US" id="id_10699837_2030161_2_1">Net income attributable to Alcoa</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US" id="id_10699837_2030161_6_1">Consolidated net income attributable to Alcoa</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xml:lang="en-US" id="id_10699837_2030162_1_1">Net Income (Loss) Attributable to Noncontrolling Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xml:lang="en-US" id="id_10699837_2030162_2_1">Less: Net income attributable to noncontrolling interests</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xml:lang="en-US" id="id_10699837_2030162_14_1">Noncontrolling interests</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:to="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xml:lang="en-US" id="id_10699837_2032110_1_1">Net Income (Loss) Available to Common Stockholders, Basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xml:lang="en-US" id="id_10699837_2032110_2_1">Net income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xml:lang="en-US" id="id_10699837_2032110_6_1">Net income available to Alcoa common shareholders - basic</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xml:lang="en-US" id="id_10699837_2031650_1_1">Net Income (Loss) Available to Common Stockholders, Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xml:lang="en-US" id="id_10699837_2031650_6_1">Net income available to Alcoa common shareholders - diluted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1" xlink:label="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1_lbl" xml:lang="en-US" id="id_10699837_2030372_1_1">New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1_lbl" xml:lang="en-US" id="id_10699837_2030372_2_1">Change due to recent accounting guidance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1" xlink:to="us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl" xml:lang="en-US" id="id_10699837_2031651_1_1">New Accounting Pronouncements and Changes in Accounting Principles [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl" xml:lang="en-US" id="id_10699837_2031651_2_1">Recently Adopted and Recently Issued Accounting Guidance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock" xlink:to="us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_NewEquityCallPlanMember" xlink:label="aa_NewEquityCallPlanMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_NewEquityCallPlanMember_lbl" xml:lang="en-US" id="id_10699837_2058626_3_1">New Equity Call Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_NewEquityCallPlanMember_lbl" xml:lang="en-US" id="id_10699837_2058626_1_1">New Equity Call Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_NewEquityCallPlanMember_lbl" xml:lang="en-US" id="id_10699837_2058626_2_1">New Equity Call Plan [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_NewEquityCallPlanMember" xlink:to="aa_NewEquityCallPlanMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_NickelContractsMember" xlink:label="aa_NickelContractsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_NickelContractsMember_lbl" xml:lang="en-US" id="id_10699837_2185259_3_1">Nickel Contracts [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_NickelContractsMember_lbl" xml:lang="en-US" id="id_10699837_2185259_1_1">Nickel Contracts [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_NickelContractsMember_lbl" xml:lang="en-US" id="id_10699837_2185259_2_1">Nickel Contracts [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_NickelContractsMember" xlink:to="aa_NickelContractsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="us-gaap_NoncontrollingInterestMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NoncontrollingInterestMember_lbl" xml:lang="en-US" id="id_10699837_2041001_1_1">Noncontrolling Interest [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NoncontrollingInterestMember_lbl" xml:lang="en-US" id="id_10699837_2041001_2_1">Noncontrolling Interests [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncontrollingInterestMember" xlink:to="us-gaap_NoncontrollingInterestMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="us-gaap_NondesignatedMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NondesignatedMember_lbl" xml:lang="en-US" id="id_10699837_2032948_1_1">Not Designated as Hedging Instrument [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NondesignatedMember_lbl" xml:lang="en-US" id="id_10699837_2032948_2_1">Derivatives Not Designated as Hedging Instruments [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NondesignatedMember" xlink:to="us-gaap_NondesignatedMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="us-gaap_NonoperatingIncomeExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xml:lang="en-US" id="id_10699837_2029055_1_1">Nonoperating Income (Expense)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xml:lang="en-US" id="id_10699837_2029055_14_1">Other income, net (J)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xml:lang="en-US" id="id_10699837_2029055_19_1">Other (income) expenses, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonoperatingIncomeExpense" xlink:to="us-gaap_NonoperatingIncomeExpense_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NonoperatingIncomeExpenseMember" xlink:label="us-gaap_NonoperatingIncomeExpenseMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NonoperatingIncomeExpenseMember_lbl" xml:lang="en-US" id="id_10699837_2031503_1_1">Nonoperating Income (Expense) [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NonoperatingIncomeExpenseMember_lbl" xml:lang="en-US" id="id_10699837_2031503_2_1">Other Expenses (Income), Net [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonoperatingIncomeExpenseMember" xlink:to="us-gaap_NonoperatingIncomeExpenseMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_NoOfHydroelectricPowerDevelopments" xlink:label="aa_NoOfHydroelectricPowerDevelopments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_NoOfHydroelectricPowerDevelopments_lbl" xml:lang="en-US" id="id_10699837_2392023_3_1">No of hydroelectric power developments.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_NoOfHydroelectricPowerDevelopments_lbl" xml:lang="en-US" id="id_10699837_2392023_1_1">No of hydroelectric power developments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_NoOfHydroelectricPowerDevelopments_lbl" xml:lang="en-US" id="id_10699837_2392023_2_1">No of hydroelectric power developments held by Yadkin</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_NoOfHydroelectricPowerDevelopments" xlink:to="aa_NoOfHydroelectricPowerDevelopments_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_NumberOfArrangementsToSellCustomerReceivables" xlink:label="aa_NumberOfArrangementsToSellCustomerReceivables"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_NumberOfArrangementsToSellCustomerReceivables_lbl" xml:lang="en-US" id="id_10699837_2228066_3_1">Number of arrangements to sell customer receivables.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_NumberOfArrangementsToSellCustomerReceivables_lbl" xml:lang="en-US" id="id_10699837_2228066_1_1">Number Of Arrangements To Sell Customer Receivables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_NumberOfArrangementsToSellCustomerReceivables_lbl" xml:lang="en-US" id="id_10699837_2228066_2_1">Number of arrangement with different financial institution to sell customer receivables</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_NumberOfArrangementsToSellCustomerReceivables" xlink:to="aa_NumberOfArrangementsToSellCustomerReceivables_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_NumberOfCleanupLocations" xlink:label="aa_NumberOfCleanupLocations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_NumberOfCleanupLocations_lbl" xml:lang="en-US" id="id_10699837_2093643_3_1">Number of cleanup locations.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_NumberOfCleanupLocations_lbl" xml:lang="en-US" id="id_10699837_2093643_1_1">Number Of Cleanup Locations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_NumberOfCleanupLocations_lbl" xml:lang="en-US" id="id_10699837_2093643_2_1">Number of cleanup locations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_NumberOfCleanupLocations" xlink:to="aa_NumberOfCleanupLocations_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_NumberOfCreditRatingAgency" xlink:label="aa_NumberOfCreditRatingAgency"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_NumberOfCreditRatingAgency_lbl" xml:lang="en-US" id="id_10699837_2328124_3_1">Number Of Credit Rating Agency</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_NumberOfCreditRatingAgency_lbl" xml:lang="en-US" id="id_10699837_2328124_1_1">Number Of Credit Rating Agency</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_NumberOfCreditRatingAgency_lbl" xml:lang="en-US" id="id_10699837_2328124_2_1">Number of credit rating agencies</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_NumberOfCreditRatingAgency" xlink:to="aa_NumberOfCreditRatingAgency_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_NumberOfEmployees" xlink:label="aa_NumberOfEmployees"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_NumberOfEmployees_lbl" xml:lang="en-US" id="id_10699837_2211599_3_1">Number of employees.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_NumberOfEmployees_lbl" xml:lang="en-US" id="id_10699837_2211599_1_1">Number Of Employees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_NumberOfEmployees_lbl" xml:lang="en-US" id="id_10699837_2211599_2_1">Number of employees</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_NumberOfEmployees" xlink:to="aa_NumberOfEmployees_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_NumberOfEmployeesAssociatedWithLayoffCosts" xlink:label="aa_NumberOfEmployeesAssociatedWithLayoffCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_NumberOfEmployeesAssociatedWithLayoffCosts_lbl" xml:lang="en-US" id="id_10699837_2260019_3_1">The number of employees an entity expects to layoff that correlates to the layoff charges recorded during the period.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_NumberOfEmployeesAssociatedWithLayoffCosts_lbl" xml:lang="en-US" id="id_10699837_2260019_1_1">Number Of Employees Associated With Layoff Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_NumberOfEmployeesAssociatedWithLayoffCosts_lbl" xml:lang="en-US" id="id_10699837_2260019_2_1">Number of employees associated with layoff costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_NumberOfEmployeesAssociatedWithLayoffCosts" xlink:to="aa_NumberOfEmployeesAssociatedWithLayoffCosts_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_NumberOfInstallments" xlink:label="aa_NumberOfInstallments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_NumberOfInstallments_lbl" xml:lang="en-US" id="id_10699837_2149577_3_1">Number of installments.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_NumberOfInstallments_lbl" xml:lang="en-US" id="id_10699837_2149577_1_1">Number Of Installments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_NumberOfInstallments_lbl" xml:lang="en-US" id="id_10699837_2149577_2_1">Number of installments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_NumberOfInstallments" xlink:to="aa_NumberOfInstallments_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_NumberOfPositions" xlink:label="aa_NumberOfPositions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_NumberOfPositions_lbl" xml:lang="en-US" id="id_10699837_2281638_3_1">Number of positions.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_NumberOfPositions_lbl" xml:lang="en-US" id="id_10699837_2281638_1_1">Number Of Positions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_NumberOfPositions_lbl" xml:lang="en-US" id="id_10699837_2281638_2_1">Number of positions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_NumberOfPositions" xlink:to="aa_NumberOfPositions_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_NumberOfRefineries" xlink:label="aa_NumberOfRefineries"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_NumberOfRefineries_lbl" xml:lang="en-US" id="id_10699837_2246729_3_1">Number Of Refineries</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_NumberOfRefineries_lbl" xml:lang="en-US" id="id_10699837_2246729_1_1">Number Of Refineries</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_NumberOfRefineries_lbl" xml:lang="en-US" id="id_10699837_2246729_2_1">Number of alumina refineries to be powered under supplied agreement</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_NumberOfRefineries" xlink:to="aa_NumberOfRefineries_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OffsettingAbstract" xlink:label="us-gaap_OffsettingAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OffsettingAbstract_lbl" xml:lang="en-US" id="id_10699837_2041012_1_1">Offsetting [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OffsettingAbstract_lbl" xml:lang="en-US" id="id_10699837_2041012_2_1">Offsetting [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OffsettingAbstract" xlink:to="us-gaap_OffsettingAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_OneContractMember" xlink:label="aa_OneContractMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_OneContractMember_lbl" xml:lang="en-US" id="id_10699837_2237794_3_1">One Contract [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_OneContractMember_lbl" xml:lang="en-US" id="id_10699837_2237794_1_1">One Contract [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_OneContractMember_lbl" xml:lang="en-US" id="id_10699837_2237794_2_1">One Contract [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax_lbl" xml:lang="en-US" id="id_10699837_2034772_14_1">Unrecognized net actuarial loss and prior service cost/benefit</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_OtherNoncurrentLiabilitiesAndDeferredCreditsMember_lbl" xml:lang="en-US" id="id_10699837_2065215_1_1">Other Noncurrent Liabilities And Deferred Credits [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_OtherNoncurrentLiabilitiesAndDeferredCreditsMember_lbl" xml:lang="en-US" id="id_10699837_2065215_2_1">Other Noncurrent Liabilities and Deferred Credits [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_OtherNoncurrentLiabilitiesAndDeferredCreditsMember" xlink:to="aa_OtherNoncurrentLiabilitiesAndDeferredCreditsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="us-gaap_OtherNonoperatingIncomeExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xml:lang="en-US" id="id_10699837_2029084_1_1">Other Nonoperating Income (Expense)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xml:lang="en-US" id="id_10699837_2029084_14_1">Other, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpense" xlink:to="us-gaap_OtherNonoperatingIncomeExpense_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_OtherNonOperatingIncomeExpenseLineItems" xlink:label="aa_OtherNonOperatingIncomeExpenseLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_OtherNonOperatingIncomeExpenseLineItems_lbl" xml:lang="en-US" id="id_10699837_2111903_3_1">Other Non operating Income Expense [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_OtherNonOperatingIncomeExpenseLineItems_lbl" xml:lang="en-US" id="id_10699837_2111903_1_1">Other Non operating Income Expense [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_OtherNonOperatingIncomeExpenseLineItems_lbl" xml:lang="en-US" id="id_10699837_2111903_2_1">Other Non operating Income Expense [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_OtherNonOperatingIncomeExpenseLineItems" xlink:to="aa_OtherNonOperatingIncomeExpenseLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherOwnershipInterestsByNameAxis" xlink:label="us-gaap_OtherOwnershipInterestsByNameAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherOwnershipInterestsByNameAxis_lbl" xml:lang="en-US" id="id_10699837_2034003_1_1">Other Ownership Interests Name [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherOwnershipInterestsByNameAxis_lbl" xml:lang="en-US" id="id_10699837_2034003_2_1">Other Ownership Interests Name [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherOwnershipInterestsByNameAxis" xlink:to="us-gaap_OtherOwnershipInterestsByNameAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherOwnershipInterestsNameDomain" xlink:label="us-gaap_OtherOwnershipInterestsNameDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherOwnershipInterestsNameDomain_lbl" xml:lang="en-US" id="id_10699837_2029085_1_1">Other Ownership Interests, Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherOwnershipInterestsNameDomain_lbl" xml:lang="en-US" id="id_10699837_2029085_2_1">Other Ownership Interests, Name [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherOwnershipInterestsNameDomain" xlink:to="us-gaap_OtherOwnershipInterestsNameDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_lbl" xml:lang="en-US" id="id_10699837_2029989_1_1">Other Postretirement Benefit Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_lbl" xml:lang="en-US" id="id_10699837_2029989_2_1">Other Postretirement Benefits [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:to="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent" xlink:label="us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_10699837_2032389_1_1">Other Postretirement Defined Benefit Plan, Liabilities, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_10699837_2032389_2_1">Accrued other postretirement benefits</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent" xlink:to="us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherReceivablesNetCurrent" xlink:label="us-gaap_OtherReceivablesNetCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherReceivablesNetCurrent_lbl" xml:lang="en-US" id="id_10699837_2031053_1_1">Other Receivables, Net, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherReceivablesNetCurrent_lbl" xml:lang="en-US" id="id_10699837_2031053_2_1">Other receivables (M)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherReceivablesNetCurrent" xlink:to="us-gaap_OtherReceivablesNetCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherRestructuringCosts" xlink:label="us-gaap_OtherRestructuringCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherRestructuringCosts_lbl" xml:lang="en-US" id="id_10699837_2031054_1_1">Other Restructuring Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherRestructuringCosts_lbl" xml:lang="en-US" id="id_10699837_2031054_2_1">Other costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OtherRestructuringCosts_lbl" xml:lang="en-US" id="id_10699837_2031054_12_1">Other layoff cost including reclassification in pension cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_OtherRestructuringCosts_lbl" xml:lang="en-US" id="id_10699837_2031054_14_1">Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherRestructuringCosts" xlink:to="us-gaap_OtherRestructuringCosts_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_OwnershipInterestInJointVenture" xlink:label="aa_OwnershipInterestInJointVenture"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_OwnershipInterestInJointVenture_lbl" xml:lang="en-US" id="id_10699837_2234608_3_1">Ownership interest in joint venture.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_OwnershipInterestInJointVenture_lbl" xml:lang="en-US" id="id_10699837_2234608_1_1">Ownership Interest In Joint Venture</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_OwnershipInterestInJointVenture_lbl" xml:lang="en-US" id="id_10699837_2234608_2_1">Ownership interest in joint venture</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_OwnershipInterestInJointVenture" xlink:to="aa_OwnershipInterestInJointVenture_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ParentMember" xlink:label="us-gaap_ParentMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ParentMember_lbl" xml:lang="en-US" id="id_10699837_2032147_1_1">Parent [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ParentMember_lbl" xml:lang="en-US" id="id_10699837_2032147_2_1">Alcoa [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ParentMember" xlink:to="us-gaap_ParentMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl" xml:lang="en-US" id="id_10699837_2028913_1_1">Payments for (Proceeds from) Other Investing Activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl" xml:lang="en-US" id="id_10699837_2028913_14_1">Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:to="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsForProceedsFromProductiveAssets" xlink:label="us-gaap_PaymentsForProceedsFromProductiveAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsForProceedsFromProductiveAssets_lbl" xml:lang="en-US" id="id_10699837_2034019_1_1">Payments for (Proceeds from) Productive Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsForProceedsFromProductiveAssets_lbl" xml:lang="en-US" id="id_10699837_2034019_14_1">Proceeds from the sale of assets and businesses (E &amp; H)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForProceedsFromProductiveAssets" xlink:to="us-gaap_PaymentsForProceedsFromProductiveAssets_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsForRestructuring" xlink:label="us-gaap_PaymentsForRestructuring"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xml:lang="en-US" id="id_10699837_2033437_1_1">Payments for Restructuring</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xml:lang="en-US" id="id_10699837_2033437_14_1">Cash payments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForRestructuring" xlink:to="us-gaap_PaymentsForRestructuring_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsOfDistributionsToAffiliates" xlink:label="us-gaap_PaymentsOfDistributionsToAffiliates"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsOfDistributionsToAffiliates_lbl" xml:lang="en-US" id="id_10699837_2030209_1_1">Payments of Distributions to Affiliates</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsOfDistributionsToAffiliates_lbl" xml:lang="en-US" id="id_10699837_2030209_14_1">Distributions to noncontrolling interests</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDistributionsToAffiliates" xlink:to="us-gaap_PaymentsOfDistributionsToAffiliates_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="us-gaap_PaymentsOfDividendsCommonStock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsOfDividendsCommonStock_lbl" xml:lang="en-US" id="id_10699837_2032826_1_1">Payments of Ordinary Dividends, Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsOfDividendsCommonStock_lbl" xml:lang="en-US" id="id_10699837_2032826_14_1">Dividends paid to shareholders</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDividendsCommonStock" xlink:to="us-gaap_PaymentsOfDividendsCommonStock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross_lbl" xml:lang="en-US" id="id_10699837_2031069_1_1">Payments to Acquire Businesses, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross_lbl" xml:lang="en-US" id="id_10699837_2031069_2_1">Cash paid for business acquisition</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireBusinessesGross" xlink:to="us-gaap_PaymentsToAcquireBusinessesGross_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_lbl" xml:lang="en-US" id="id_10699837_2031535_1_1">Payments to Acquire Businesses, Net of Cash Acquired</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_lbl" xml:lang="en-US" id="id_10699837_2031535_14_1">Acquisitions, net of cash acquired (E)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:to="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireEquityMethodInvestments" xlink:label="us-gaap_PaymentsToAcquireEquityMethodInvestments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireEquityMethodInvestments_lbl" xml:lang="en-US" id="id_10699837_2029786_1_1">Payments to Acquire Equity Method Investments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PaymentsToAcquireEquityMethodInvestments_lbl" xml:lang="en-US" id="id_10699837_2029786_2_1">Capital investment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireEquityMethodInvestments" xlink:to="us-gaap_PaymentsToAcquireEquityMethodInvestments_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:label="us-gaap_PaymentsToAcquireInvestments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireInvestments_lbl" xml:lang="en-US" id="id_10699837_2029100_1_1">Payments to Acquire Investments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquireInvestments_lbl" xml:lang="en-US" id="id_10699837_2029100_14_1">Additions to investments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireInvestments" xlink:to="us-gaap_PaymentsToAcquireInvestments_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_10699837_2034791_1_1">Payments to Acquire Property, Plant, and Equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_10699837_2034791_14_1">Capital expenditures</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitExpenseAbstract" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitExpenseAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitExpenseAbstract_lbl" xml:lang="en-US" id="id_10699837_2034024_1_1">Pension and Other Postretirement Benefit Expense [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitExpenseAbstract_lbl" xml:lang="en-US" id="id_10699837_2034024_2_1">Pension and other postretirement benefits</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionAndOtherPostretirementBenefitExpenseAbstract" xlink:to="us-gaap_PensionAndOtherPostretirementBenefitExpenseAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PensionAndOtherPostretirementBenefitsCostsChargedToRestructuringMember" xlink:label="aa_PensionAndOtherPostretirementBenefitsCostsChargedToRestructuringMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PensionAndOtherPostretirementBenefitsCostsChargedToRestructuringMember_lbl" xml:lang="en-US" id="id_10699837_2392856_3_1">Pension and other postretirement benefits costs charged to Restructuring.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PensionAndOtherPostretirementBenefitsCostsChargedToRestructuringMember_lbl" xml:lang="en-US" id="id_10699837_2392856_1_1">Pension And Other Postretirement Benefits Costs Charged To Restructuring [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PensionAndOtherPostretirementBenefitsCostsChargedToRestructuringMember_lbl" xml:lang="en-US" id="id_10699837_2392856_2_1">Pension And Other Postretirement Benefits Costs Charged To Restructuring [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PensionAndOtherPostretirementBenefitsCostsChargedToRestructuringMember" xlink:to="aa_PensionAndOtherPostretirementBenefitsCostsChargedToRestructuringMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xml:lang="en-US" id="id_10699837_2041049_1_1">Pension and Other Postretirement Benefits Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xml:lang="en-US" id="id_10699837_2041049_2_1">Pension and Other Postretirement Benefits</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:to="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PensionContributions" xlink:label="us-gaap_PensionContributions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionContributions_lbl" xml:lang="en-US" id="id_10699837_2028918_1_1">Pension Contributions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PensionContributions_lbl" xml:lang="en-US" id="id_10699837_2028918_14_1">Pension contributions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionContributions" xlink:to="us-gaap_PensionContributions_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="us-gaap_PensionPlansDefinedBenefitMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionPlansDefinedBenefitMember_lbl" xml:lang="en-US" id="id_10699837_2030639_1_1">Pension Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PensionPlansDefinedBenefitMember_lbl" xml:lang="en-US" id="id_10699837_2030639_2_1">Pension Benefits [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionPlansDefinedBenefitMember" xlink:to="us-gaap_PensionPlansDefinedBenefitMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PercentageOfCostOfGoodsSold" xlink:label="aa_PercentageOfCostOfGoodsSold"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PercentageOfCostOfGoodsSold_lbl" xml:lang="en-US" id="id_10699837_2345063_3_1">Percentage of cost of goods sold.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PercentageOfCostOfGoodsSold_lbl" xml:lang="en-US" id="id_10699837_2345063_1_1">Percentage Of Cost Of Goods Sold</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PercentageOfCostOfGoodsSold_lbl" xml:lang="en-US" id="id_10699837_2345063_2_1">Percentage of cost of goods sold</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PercentageOfCostOfGoodsSold" xlink:to="aa_PercentageOfCostOfGoodsSold_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PercentageOfPaymentsAndRemediationCostsUnderAdministrativeAgreement" xlink:label="aa_PercentageOfPaymentsAndRemediationCostsUnderAdministrativeAgreement"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PercentageOfPaymentsAndRemediationCostsUnderAdministrativeAgreement_lbl" xml:lang="en-US" id="id_10699837_2371715_3_1">Percentage of payments and remediation costs under administrative agreement.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PercentageOfPaymentsAndRemediationCostsUnderAdministrativeAgreement_lbl" xml:lang="en-US" id="id_10699837_2371715_1_1">Percentage of Payments And Remediation Costs Under Administrative Agreement</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PercentageOfPaymentsAndRemediationCostsUnderAdministrativeAgreement_lbl" xml:lang="en-US" id="id_10699837_2371715_2_1">Percentage of payments and remediation costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PercentageOfPaymentsAndRemediationCostsUnderAdministrativeAgreement" xlink:to="aa_PercentageOfPaymentsAndRemediationCostsUnderAdministrativeAgreement_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PercentageOfPenaltyOnAmountOfAdditionalTaxesDue" xlink:label="aa_PercentageOfPenaltyOnAmountOfAdditionalTaxesDue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PercentageOfPenaltyOnAmountOfAdditionalTaxesDue_lbl" xml:lang="en-US" id="id_10699837_2280626_3_1">Percentage of penalty on amount of additional taxes due.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PercentageOfPenaltyOnAmountOfAdditionalTaxesDue_lbl" xml:lang="en-US" id="id_10699837_2280626_1_1">Percentage Of Penalty On Amount Of Additional Taxes Due</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PercentageOfPenaltyOnAmountOfAdditionalTaxesDue_lbl" xml:lang="en-US" id="id_10699837_2280626_2_1">Percentage of penalty of the gross disallowed amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PercentageOfPenaltyOnAmountOfAdditionalTaxesDue" xlink:to="aa_PercentageOfPenaltyOnAmountOfAdditionalTaxesDue_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PercentageOfPowerSupplied" xlink:label="aa_PercentageOfPowerSupplied"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PercentageOfPowerSupplied_lbl" xml:lang="en-US" id="id_10699837_2287476_3_1">Percentage of power supplied.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PercentageOfPowerSupplied_lbl" xml:lang="en-US" id="id_10699837_2287476_1_1">Percentage Of Power Supplied</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PercentageOfPowerSupplied_lbl" xml:lang="en-US" id="id_10699837_2287476_2_1">Percentage of power supply</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PercentageOfPowerSupplied" xlink:to="aa_PercentageOfPowerSupplied_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PeriodOfEnvironmentalRemediationDamages" xlink:label="aa_PeriodOfEnvironmentalRemediationDamages"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PeriodOfEnvironmentalRemediationDamages_lbl" xml:lang="en-US" id="id_10699837_2246755_3_1">Period of environmental remediation damages.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PeriodOfEnvironmentalRemediationDamages_lbl" xml:lang="en-US" id="id_10699837_2246755_1_1">Period of Environmental Remediation Damages</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PeriodOfEnvironmentalRemediationDamages_lbl" xml:lang="en-US" id="id_10699837_2246755_2_1">Payment period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PeriodOfEnvironmentalRemediationDamages" xlink:to="aa_PeriodOfEnvironmentalRemediationDamages_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PocosDeCaldasRefineryMember" xlink:label="aa_PocosDeCaldasRefineryMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PocosDeCaldasRefineryMember_lbl" xml:lang="en-US" id="id_10699837_2131548_3_1">Pocos De Caldas Refinery [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PocosDeCaldasRefineryMember_lbl" xml:lang="en-US" id="id_10699837_2131548_1_1">Pocos De Caldas Refinery [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PocosDeCaldasRefineryMember_lbl" xml:lang="en-US" id="id_10699837_2131548_2_1">Pocos de Caldas Smelter [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PocosDeCaldasRefineryMember" xlink:to="aa_PocosDeCaldasRefineryMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PointHenrySmelterMember" xlink:label="aa_PointHenrySmelterMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PointHenrySmelterMember_lbl" xml:lang="en-US" id="id_10699837_2099026_3_1">Point Henry smelter.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PointHenrySmelterMember_lbl" xml:lang="en-US" id="id_10699837_2099026_1_1">Point Henry Smelter [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PointHenrySmelterMember_lbl" xml:lang="en-US" id="id_10699837_2099026_2_1">Point Henry Smelter [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PointHenrySmelterMember" xlink:to="aa_PointHenrySmelterMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PortovesmeSiteMember" xlink:label="aa_PortovesmeSiteMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PortovesmeSiteMember_lbl" xml:lang="en-US" id="id_10699837_2231180_3_1">Portovesme site.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PortovesmeSiteMember_lbl" xml:lang="en-US" id="id_10699837_2231180_1_1">Portovesme Site [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PortovesmeSiteMember_lbl" xml:lang="en-US" id="id_10699837_2231180_2_1">Portovesme [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PortovesmeSiteMember" xlink:to="aa_PortovesmeSiteMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PostClosingAdjustmentsMember" xlink:label="aa_PostClosingAdjustmentsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PostClosingAdjustmentsMember_lbl" xml:lang="en-US" id="id_10699837_2338607_3_1">Post closing adjustments.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PostClosingAdjustmentsMember_lbl" xml:lang="en-US" id="id_10699837_2338607_1_1">Post Closing Adjustments [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PostClosingAdjustmentsMember_lbl" xml:lang="en-US" id="id_10699837_2338607_2_1">Post Closing Adjustments [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PostClosingAdjustmentsMember" xlink:to="aa_PostClosingAdjustmentsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PredecessorMember" xlink:label="us-gaap_PredecessorMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PredecessorMember_lbl" xml:lang="en-US" id="id_10699837_2033453_1_1">Predecessor [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PredecessorMember_lbl" xml:lang="en-US" id="id_10699837_2033453_2_1">Predecessor [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PredecessorMember" xlink:to="us-gaap_PredecessorMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredClassAMember" xlink:label="us-gaap_PreferredClassAMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredClassAMember_lbl" xml:lang="en-US" id="id_10699837_2028471_1_1">Preferred Class A [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredClassAMember_lbl" xml:lang="en-US" id="id_10699837_2028471_2_1">Preferred Class A [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredClassAMember" xlink:to="us-gaap_PreferredClassAMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredClassBMember" xlink:label="us-gaap_PreferredClassBMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredClassBMember_lbl" xml:lang="en-US" id="id_10699837_2033004_1_1">Preferred Class B [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredClassBMember_lbl" xml:lang="en-US" id="id_10699837_2033004_2_1">Preferred Class B [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredClassBMember" xlink:to="us-gaap_PreferredClassBMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockDividendsAndOtherAdjustments" xlink:label="us-gaap_PreferredStockDividendsAndOtherAdjustments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockDividendsAndOtherAdjustments_lbl" xml:lang="en-US" id="id_10699837_2034039_1_1">Preferred Stock Dividends and Other Adjustments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockDividendsAndOtherAdjustments_lbl" xml:lang="en-US" id="id_10699837_2034039_2_1">Less: preferred stock dividends declared</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockDividendsAndOtherAdjustments" xlink:to="us-gaap_PreferredStockDividendsAndOtherAdjustments_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockDividendsPerShareDeclared" xlink:label="us-gaap_PreferredStockDividendsPerShareDeclared"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockDividendsPerShareDeclared_lbl" xml:lang="en-US" id="id_10699837_2030230_1_1">Preferred Stock, Dividends Per Share, Declared</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockDividendsPerShareDeclared_lbl" xml:lang="en-US" id="id_10699837_2030230_2_1">Preferred, dividends per share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockDividendsPerShareDeclared" xlink:to="us-gaap_PreferredStockDividendsPerShareDeclared_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockMember_lbl" xml:lang="en-US" id="id_10699837_2029109_1_1">Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockMember_lbl" xml:lang="en-US" id="id_10699837_2029109_2_1">Preferred Stock [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockMember" xlink:to="us-gaap_PreferredStockMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US" id="id_10699837_2034043_1_1">Preferred Stock, Value, Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US" id="id_10699837_2034043_2_1">Preferred stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockValue" xlink:to="us-gaap_PreferredStockValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xml:lang="en-US" id="id_10699837_2037836_1_1">Prepaid Expense and Other Assets, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xml:lang="en-US" id="id_10699837_2037836_2_1">Prepaid expenses and other current assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:to="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:label="us-gaap_PrepaidExpenseCurrentAndNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpenseCurrentAndNoncurrent_lbl" xml:lang="en-US" id="id_10699837_2028730_1_1">Prepaid Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PrepaidExpenseCurrentAndNoncurrent_lbl" xml:lang="en-US" id="id_10699837_2028730_2_1">Prepayments made under the agreement for future gas transmission services</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:to="us-gaap_PrepaidExpenseCurrentAndNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember" xlink:label="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_lbl" xml:lang="en-US" id="id_10699837_2029605_1_1">Prepaid Expenses and Other Current Assets [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_lbl" xml:lang="en-US" id="id_10699837_2029605_2_1">Prepaid Expenses and Other Current Assets [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember" xlink:to="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PriceOfAluminumBeyondForwardCurveMember" xlink:label="aa_PriceOfAluminumBeyondForwardCurveMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PriceOfAluminumBeyondForwardCurveMember_lbl" xml:lang="en-US" id="id_10699837_2096324_3_1">Price of aluminum beyond forward curve.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PriceOfAluminumBeyondForwardCurveMember_lbl" xml:lang="en-US" id="id_10699837_2096324_1_1">Price Of Aluminum Beyond Forward Curve [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PriceOfAluminumBeyondForwardCurveMember_lbl" xml:lang="en-US" id="id_10699837_2096324_2_1">Price of Aluminum beyond Forward Curve [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PriceOfAluminumBeyondForwardCurveMember" xlink:to="aa_PriceOfAluminumBeyondForwardCurveMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PriceOfElectricityBeyondForwardCurveMember" xlink:label="aa_PriceOfElectricityBeyondForwardCurveMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PriceOfElectricityBeyondForwardCurveMember_lbl" xml:lang="en-US" id="id_10699837_2090921_3_1">Price of electricity beyond forward curve.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PriceOfElectricityBeyondForwardCurveMember_lbl" xml:lang="en-US" id="id_10699837_2090921_1_1">Price Of Electricity Beyond Forward Curve [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PriceOfElectricityBeyondForwardCurveMember_lbl" xml:lang="en-US" id="id_10699837_2090921_2_1">Price of Electricity beyond Forward Curve [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PriceOfElectricityBeyondForwardCurveMember" xlink:to="aa_PriceOfElectricityBeyondForwardCurveMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_PrimaryMetalsMember" xlink:label="aa_PrimaryMetalsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_PrimaryMetalsMember_lbl" xml:lang="en-US" id="id_10699837_2255064_3_1">Primary metals.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_PrimaryMetalsMember_lbl" xml:lang="en-US" id="id_10699837_2255064_1_1">Primary Metals [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_PrimaryMetalsMember_lbl" xml:lang="en-US" id="id_10699837_2255064_2_1">Primary Metals [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_PrimaryMetalsMember" xlink:to="aa_PrimaryMetalsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromCollectionOfOtherReceivables" xlink:label="us-gaap_ProceedsFromCollectionOfOtherReceivables"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromCollectionOfOtherReceivables_lbl" xml:lang="en-US" id="id_10699837_2030654_1_1">Proceeds from Collection of Other Receivables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromCollectionOfOtherReceivables_lbl" xml:lang="en-US" id="id_10699837_2030654_2_1">Cash collections of other receivables</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromCollectionOfOtherReceivables" xlink:to="us-gaap_ProceedsFromCollectionOfOtherReceivables_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses" xlink:label="us-gaap_ProceedsFromDivestitureOfBusinesses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromDivestitureOfBusinesses_lbl" xml:lang="en-US" id="id_10699837_2031724_1_1">Proceeds from Divestiture of Businesses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromDivestitureOfBusinesses_lbl" xml:lang="en-US" id="id_10699837_2031724_2_1">Amount to be received by sale of investment percentage in DBP</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromDivestitureOfBusinesses" xlink:to="us-gaap_ProceedsFromDivestitureOfBusinesses_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xml:lang="en-US" id="id_10699837_2039020_1_1">Proceeds from Issuance of Long-term Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xml:lang="en-US" id="id_10699837_2039020_2_1">Additions to debt (original maturities greater than three months)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:to="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ProceedsFromReceivableFunding" xlink:label="aa_ProceedsFromReceivableFunding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ProceedsFromReceivableFunding_lbl" xml:lang="en-US" id="id_10699837_2133487_3_1">Proceeds from receivable funding.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ProceedsFromReceivableFunding_lbl" xml:lang="en-US" id="id_10699837_2133487_1_1">Proceeds From Receivable Funding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ProceedsFromReceivableFunding_lbl" xml:lang="en-US" id="id_10699837_2133487_2_1">Amount of cash draws under arrangement</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ProceedsFromReceivableFunding" xlink:to="aa_ProceedsFromReceivableFunding_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess" xlink:label="us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess_lbl" xml:lang="en-US" id="id_10699837_2041064_1_1">Proceeds from (Repayments of) Short-term Debt, Maturing in Three Months or Less</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess_lbl" xml:lang="en-US" id="id_10699837_2041064_2_1">Net change in short-term borrowings (original maturities of three months or less)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess" xlink:to="us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments" xlink:label="us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_lbl" xml:lang="en-US" id="id_10699837_2030427_1_1">Proceeds from Sale, Maturity and Collection of Investments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_lbl" xml:lang="en-US" id="id_10699837_2030427_2_1">Sales of investments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_lbl" xml:lang="en-US" id="id_10699837_2030427_12_1">Sales of investments (G)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments" xlink:to="us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ProceedsFromSaleOfLifeInsurancePolicies" xlink:label="aa_ProceedsFromSaleOfLifeInsurancePolicies"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ProceedsFromSaleOfLifeInsurancePolicies_lbl" xml:lang="en-US" id="id_10699837_2392857_3_1">Proceeds from sale of life insurance policies.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ProceedsFromSaleOfLifeInsurancePolicies_lbl" xml:lang="en-US" id="id_10699837_2392857_1_1">Proceeds From Sale Of Life Insurance Policies</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ProceedsFromSaleOfLifeInsurancePolicies_lbl" xml:lang="en-US" id="id_10699837_2392857_2_1">Proceeds from sale of company-owned life insurance policies</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ProceedsFromSaleOfLifeInsurancePolicies" xlink:to="aa_ProceedsFromSaleOfLifeInsurancePolicies_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="us-gaap_ProceedsFromStockOptionsExercised"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xml:lang="en-US" id="id_10699837_2039031_1_1">Proceeds from Stock Options Exercised</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xml:lang="en-US" id="id_10699837_2039031_2_1">Proceeds from exercise of employee stock options</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromStockOptionsExercised" xlink:to="us-gaap_ProceedsFromStockOptionsExercised_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProfitLoss_lbl" xml:lang="en-US" id="id_10699837_2039475_1_1">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProfitLoss_lbl" xml:lang="en-US" id="id_10699837_2039475_2_1">Net income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ProfitLoss_lbl" xml:lang="en-US" id="id_10699837_2039475_6_1">Net income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xml:lang="en-US" id="id_10699837_2030037_1_1">Property, Plant and Equipment, Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xml:lang="en-US" id="id_10699837_2030037_2_1">Property, Plant and Equipment, Type [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="us-gaap_PropertyPlantAndEquipmentGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xml:lang="en-US" id="id_10699837_2035051_1_1">Property, Plant and Equipment, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xml:lang="en-US" id="id_10699837_2035051_2_1">Properties, plants, and equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xml:lang="en-US" id="id_10699837_2035024_1_1">Property, Plant and Equipment, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xml:lang="en-US" id="id_10699837_2035024_6_1">Properties, plants, and equipment, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xml:lang="en-US" id="id_10699837_2029377_1_1">Property, Plant and Equipment, Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xml:lang="en-US" id="id_10699837_2029377_2_1">Property, Plant and Equipment, Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ProposedSeparationTransactionAbstract" xlink:label="aa_ProposedSeparationTransactionAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ProposedSeparationTransactionAbstract_lbl" xml:lang="en-US" id="id_10699837_2276208_3_1">Proposed Separation Transaction [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ProposedSeparationTransactionAbstract_lbl" xml:lang="en-US" id="id_10699837_2276208_1_1">Proposed Separation Transaction [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ProposedSeparationTransactionAbstract_lbl" xml:lang="en-US" id="id_10699837_2276208_2_1">Proposed Separation Transaction [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ProposedSeparationTransactionAbstract" xlink:to="aa_ProposedSeparationTransactionAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ProposedSeparationTransactionCostsBeforeTax" xlink:label="aa_ProposedSeparationTransactionCostsBeforeTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ProposedSeparationTransactionCostsBeforeTax_lbl" xml:lang="en-US" id="id_10699837_2066215_3_1">Proposed separation transaction costs before tax.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ProposedSeparationTransactionCostsBeforeTax_lbl" xml:lang="en-US" id="id_10699837_2066215_1_1">Proposed Separation Transaction Costs Before Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ProposedSeparationTransactionCostsBeforeTax_lbl" xml:lang="en-US" id="id_10699837_2066215_2_1">Costs related to proposed transaction, pre-tax</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ProposedSeparationTransactionCostsBeforeTax" xlink:to="aa_ProposedSeparationTransactionCostsBeforeTax_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ProposedSeparationTransactionCostsNetOfTax" xlink:label="aa_ProposedSeparationTransactionCostsNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ProposedSeparationTransactionCostsNetOfTax_lbl" xml:lang="en-US" id="id_10699837_2104940_3_1">Proposed separation transaction costs net of tax.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ProposedSeparationTransactionCostsNetOfTax_lbl" xml:lang="en-US" id="id_10699837_2104940_1_1">Proposed Separation Transaction Costs Net Of tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ProposedSeparationTransactionCostsNetOfTax_lbl" xml:lang="en-US" id="id_10699837_2104940_2_1">Costs related to proposed transaction, after-tax</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ProposedSeparationTransactionCostsNetOfTax" xlink:to="aa_ProposedSeparationTransactionCostsNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ProposedSeparationTransactionDisclosureTextBlock" xlink:label="aa_ProposedSeparationTransactionDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ProposedSeparationTransactionDisclosureTextBlock_lbl" xml:lang="en-US" id="id_10699837_2200760_3_1">Proposed Separation Transaction Disclosure [Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_RecurringCostsOfManagingHazardousSubstancesAndEnvironmentalProgramsMember_lbl" xml:lang="en-US" id="id_10699837_2344504_3_1">Recurring costs of managing hazardous substances and environmental programs.</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyDomain_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xml:lang="en-US" id="id_10699837_2038452_2_1">Related Party [Axis]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xml:lang="en-US" id="id_10699837_2038837_2_1">Research and development expenses</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_RestructuringAndRelatedChargesMember_lbl" xml:lang="en-US" id="id_10699837_2124776_1_1">Restructuring And Related Charges [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_RestructuringAndRelatedChargesMember_lbl" xml:lang="en-US" id="id_10699837_2124776_2_1">Restructuring And Related Charges [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_RestructuringAndRelatedChargesMember" xlink:to="aa_RestructuringAndRelatedChargesMember_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDate_lbl" xml:lang="en-US" id="id_10699837_2037886_2_1">Approximate number of employees already laid off</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_RestructuringChargeForLayoffs_lbl" xml:lang="en-US" id="id_10699837_2204541_2_1">Cash payments made against the layoff reserves</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestructuringCharges_lbl" xml:lang="en-US" id="id_10699837_2036222_1_1">Restructuring Charges</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestructuringCharges_lbl" xml:lang="en-US" id="id_10699837_2036222_2_1">Restructuring and other charges</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RestructuringCharges_lbl" xml:lang="en-US" id="id_10699837_2036222_12_1">Restructuring and other charges (D)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringCharges" xlink:to="us-gaap_RestructuringCharges_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="us-gaap_RestructuringCostAndReserveAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestructuringCostAndReserveAxis_lbl" xml:lang="en-US" id="id_10699837_2038663_1_1">Restructuring Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestructuringCostAndReserveAxis_lbl" xml:lang="en-US" id="id_10699837_2038663_2_1">Restructuring Type [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringCostAndReserveAxis" xlink:to="us-gaap_RestructuringCostAndReserveAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="us-gaap_RestructuringCostAndReserveLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestructuringCostAndReserveLineItems_lbl" xml:lang="en-US" id="id_10699837_2039076_1_1">Restructuring Cost and Reserve [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestructuringCostAndReserveLineItems_lbl" xml:lang="en-US" id="id_10699837_2039076_2_1">Restructuring Cost and Reserve [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringCostAndReserveLineItems" xlink:to="us-gaap_RestructuringCostAndReserveLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_RestructuringProgramsLayoffsTwoThousandFifteenMember" xlink:label="aa_RestructuringProgramsLayoffsTwoThousandFifteenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_RestructuringProgramsLayoffsTwoThousandFifteenMember_lbl" xml:lang="en-US" id="id_10699837_2074583_3_1">Restructuring programs layoffs two thousand fifteen.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_RestructuringProgramsLayoffsTwoThousandFifteenMember_lbl" xml:lang="en-US" id="id_10699837_2074583_1_1">Restructuring Programs Layoffs Two Thousand Fifteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_RestructuringProgramsLayoffsTwoThousandFifteenMember_lbl" xml:lang="en-US" id="id_10699837_2074583_2_1">Restructuring Programs Layoffs 2015 [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_RestructuringProgramsLayoffsTwoThousandFifteenMember" xlink:to="aa_RestructuringProgramsLayoffsTwoThousandFifteenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_RestructuringProgramsLayoffsTwoThousandFourteenMember" xlink:label="aa_RestructuringProgramsLayoffsTwoThousandFourteenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_RestructuringProgramsLayoffsTwoThousandFourteenMember_lbl" xml:lang="en-US" id="id_10699837_2134187_3_1">Restructuring programs layoffs two thousand fourteen.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_RestructuringProgramsLayoffsTwoThousandFourteenMember_lbl" xml:lang="en-US" id="id_10699837_2134187_1_1">Restructuring Programs Layoffs Two Thousand Fourteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_RestructuringProgramsLayoffsTwoThousandFourteenMember_lbl" xml:lang="en-US" id="id_10699837_2134187_2_1">Restructuring Programs Layoffs 2014 [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_RestructuringProgramsLayoffsTwoThousandFourteenMember" xlink:to="aa_RestructuringProgramsLayoffsTwoThousandFourteenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_RestructuringProgramsLayoffsTwoThousandSixteenMember" xlink:label="aa_RestructuringProgramsLayoffsTwoThousandSixteenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_RestructuringProgramsLayoffsTwoThousandSixteenMember_lbl" xml:lang="en-US" id="id_10699837_2063786_3_1">Restructuring Programs Layoffs Two Thousand Sixteen Member</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_RestructuringProgramsLayoffsTwoThousandSixteenMember_lbl" xml:lang="en-US" id="id_10699837_2063786_1_1">Restructuring Programs Layoffs Two Thousand Sixteen Member</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_RestructuringProgramsLayoffsTwoThousandSixteenMember_lbl" xml:lang="en-US" id="id_10699837_2063786_2_1">Restructuring Programs Layoffs 2016 [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_RestructuringProgramsLayoffsTwoThousandSixteenMember" xlink:to="aa_RestructuringProgramsLayoffsTwoThousandSixteenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringReserve" xlink:label="us-gaap_RestructuringReserve"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestructuringReserve_lbl" xml:lang="en-US" id="id_10699837_2035673_1_1">Restructuring Reserve</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_RestructuringReserve_lbl" xml:lang="en-US" id="id_10699837_2035673_4_1">Restructuring reserve ending balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_RestructuringReserve_lbl" xml:lang="en-US" id="id_10699837_2035673_5_1">Restructuring reserve beginning balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringReserve" xlink:to="us-gaap_RestructuringReserve_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_RestructuringReservePeriodExpenses" xlink:label="aa_RestructuringReservePeriodExpenses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_RestructuringReservePeriodExpenses_lbl" xml:lang="en-US" id="id_10699837_2283993_3_1">Restructuring reserve period expenses.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_RestructuringReservePeriodExpenses_lbl" xml:lang="en-US" id="id_10699837_2283993_1_1">Restructuring Reserve Period Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_RestructuringReservePeriodExpenses_lbl" xml:lang="en-US" id="id_10699837_2283993_2_1">Restructuring charges</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_RestructuringReservePeriodExpenses" xlink:to="aa_RestructuringReservePeriodExpenses_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US" id="id_10699837_2037317_1_1">Retained Earnings (Accumulated Deficit)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US" id="id_10699837_2037317_2_1">Retained earnings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="us-gaap_RetainedEarningsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsMember_lbl" xml:lang="en-US" id="id_10699837_2037658_1_1">Retained Earnings [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RetainedEarningsMember_lbl" xml:lang="en-US" id="id_10699837_2037658_2_1">Retained Earnings [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsMember" xlink:to="us-gaap_RetainedEarningsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_RTIMember" xlink:label="aa_RTIMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_RTIMember_lbl" xml:lang="en-US" id="id_10699837_2210642_3_1">RTI.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_RTIMember_lbl" xml:lang="en-US" id="id_10699837_2210642_1_1">RTI [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_RTIMember_lbl" xml:lang="en-US" id="id_10699837_2210642_2_1">RTI [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_RTIMember" xlink:to="aa_RTIMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_RussiaMember" xlink:label="aa_RussiaMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_RussiaMember_lbl" xml:lang="en-US" id="id_10699837_2066128_3_1">Russia [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_RussiaMember_lbl" xml:lang="en-US" id="id_10699837_2066128_1_1">Russia [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_RussiaMember_lbl" xml:lang="en-US" id="id_10699837_2066128_2_1">Rolling Mill in Russia [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_RussiaMember" xlink:to="aa_RussiaMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="us-gaap_SalesRevenueGoodsNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SalesRevenueGoodsNet_lbl" xml:lang="en-US" id="id_10699837_2035512_1_1">Sales Revenue, Goods, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="us-gaap_SalesRevenueGoodsNet_lbl" xml:lang="en-US" id="id_10699837_2035512_32_1">Total sales</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SalesRevenueGoodsNet_lbl" xml:lang="en-US" id="id_10699837_2035512_2_1">Sale generated in last annual period prior to divestiture</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SalesRevenueGoodsNet_lbl" xml:lang="en-US" id="id_10699837_2035512_12_1">Sales (K)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SalesRevenueGoodsNet" xlink:to="us-gaap_SalesRevenueGoodsNet_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SaoLuisSmelterMember" xlink:label="aa_SaoLuisSmelterMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SaoLuisSmelterMember_lbl" xml:lang="en-US" id="id_10699837_2112607_3_1">Sao Luis Smelter [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SaoLuisSmelterMember_lbl" xml:lang="en-US" id="id_10699837_2112607_1_1">Sao Luis Smelter [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_SaoLuisSmelterMember_lbl" xml:lang="en-US" id="id_10699837_2112607_2_1">Sao Luis Smelter [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SaoLuisSmelterMember" xlink:to="aa_SaoLuisSmelterMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="us-gaap_ScenarioUnspecifiedDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScenarioUnspecifiedDomain_lbl" xml:lang="en-US" id="id_10699837_2036952_1_1">Scenario, Unspecified [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScenarioUnspecifiedDomain_lbl" xml:lang="en-US" id="id_10699837_2036952_2_1">Scenario, Unspecified [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScenarioUnspecifiedDomain" xlink:to="us-gaap_ScenarioUnspecifiedDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock" xlink:label="us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_lbl" xml:lang="en-US" id="id_10699837_2036419_1_1">Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_lbl" xml:lang="en-US" id="id_10699837_2036419_2_1">Summary of Changes in Accumulated Other Comprehensive (Loss) by Component</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock" xlink:to="us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xml:lang="en-US" id="id_10699837_2035513_1_1">Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xml:lang="en-US" id="id_10699837_2035513_2_1">Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:to="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_lbl" xml:lang="en-US" id="id_10699837_2035694_1_1">Schedule of Business Acquisitions, by Acquisition [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_lbl" xml:lang="en-US" id="id_10699837_2035694_2_1">Schedule of Business Acquisitions, by Acquisition [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:to="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ScheduleOfCarryingValuesAndFairValuesOfOtherFinancialInstrumentsTableTextBlock" xlink:label="aa_ScheduleOfCarryingValuesAndFairValuesOfOtherFinancialInstrumentsTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ScheduleOfCarryingValuesAndFairValuesOfOtherFinancialInstrumentsTableTextBlock_lbl" xml:lang="en-US" id="id_10699837_2143117_3_1">Schedule of carrying values and fair values of other financial instruments.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ScheduleOfCarryingValuesAndFairValuesOfOtherFinancialInstrumentsTableTextBlock_lbl" xml:lang="en-US" id="id_10699837_2143117_1_1">Schedule Of Carrying Values And Fair Values Of Other Financial Instruments [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ScheduleOfCarryingValuesAndFairValuesOfOtherFinancialInstrumentsTableTextBlock_lbl" xml:lang="en-US" id="id_10699837_2143117_2_1">Schedule of Carrying Values and Fair Values of Other Financial Instruments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ScheduleOfCarryingValuesAndFairValuesOfOtherFinancialInstrumentsTableTextBlock" xlink:to="aa_ScheduleOfCarryingValuesAndFairValuesOfOtherFinancialInstrumentsTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ScheduleOfOtherNonOperatingIncomeExpenseTable_lbl" xml:lang="en-US" id="id_10699837_2290826_1_1">Schedule Of Other Non operating Income Expense [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ScheduleOfOtherNonOperatingIncomeExpenseTable_lbl" xml:lang="en-US" id="id_10699837_2290826_2_1">Schedule Of Other Non operating Income Expense [Table]</label>
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    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ScheduleOfProFormaRestructuringChargesByReportableSegmentBeforeIncomeTaxTableTextBlock" xlink:label="aa_ScheduleOfProFormaRestructuringChargesByReportableSegmentBeforeIncomeTaxTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ScheduleOfProFormaRestructuringChargesByReportableSegmentBeforeIncomeTaxTableTextBlock_lbl" xml:lang="en-US" id="id_10699837_2361302_3_1">Tabular disclosure of the entity restructuring charges before income tax by reportable segment had such charges been included in the entity's segment results.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ScheduleOfQuantitativeInformationForLevelThreeDerivativeContractsTableTextBlock_lbl" xml:lang="en-US" id="id_10699837_2244088_3_1">Schedule of quantitative information for level three derivative contracts.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_lbl" xml:lang="en-US" id="id_10699837_2037918_2_1">Schedule of Restructuring and Related Costs [Table]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_lbl" xml:lang="en-US" id="id_10699837_2036599_1_1">Schedule of Segment Reporting Information, by Segment [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_lbl" xml:lang="en-US" id="id_10699837_2036599_2_1">Schedule of Segment Reporting Information, by Segment [Table]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xml:lang="en-US" id="id_10699837_2039315_1_1">Schedule of Segment Reporting Information, by Segment [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xml:lang="en-US" id="id_10699837_2039315_2_1">Schedule of Operating Results of Alcoa's Reportable Segments</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ScheduleOfSegmentReportingInformationToConsolidateNetIncomeLossAttributableToParentTableTextBlock_lbl" xml:lang="en-US" id="id_10699837_2048087_3_1">Tabular disclosure of schedule of segment reporting information to consolidate net income loss attributable to parent.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SecondInstallmentMember_lbl" xml:lang="en-US" id="id_10699837_2053757_1_1">Second Installment [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_SecondInstallmentMember_lbl" xml:lang="en-US" id="id_10699837_2053757_2_1">Second Installment [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentDomain_lbl" xml:lang="en-US" id="id_10699837_2039911_1_1">Segments [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentDomain_lbl" xml:lang="en-US" id="id_10699837_2039911_2_1">Segments [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentDomain" xlink:to="us-gaap_SegmentDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="us-gaap_SegmentGeographicalDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentGeographicalDomain_lbl" xml:lang="en-US" id="id_10699837_2034488_1_1">Geographical [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentGeographicalDomain_lbl" xml:lang="en-US" id="id_10699837_2034488_2_1">Geographical [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentGeographicalDomain" xlink:to="us-gaap_SegmentGeographicalDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xml:lang="en-US" id="id_10699837_2039912_1_1">Segment Reporting [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xml:lang="en-US" id="id_10699837_2039912_2_1">Segment Reporting [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingAbstract" xlink:to="us-gaap_SegmentReportingAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xml:lang="en-US" id="id_10699837_2039114_1_1">Segment Reporting Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xml:lang="en-US" id="id_10699837_2039114_2_1">Segment Information</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingDisclosureTextBlock" xlink:to="us-gaap_SegmentReportingDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SegmentReportingInformationCorporateExpenses" xlink:label="aa_SegmentReportingInformationCorporateExpenses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SegmentReportingInformationCorporateExpenses_lbl" xml:lang="en-US" id="id_10699837_2119617_3_1">Segment reporting information corporate expenses.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SegmentReportingInformationCorporateExpenses_lbl" xml:lang="en-US" id="id_10699837_2119617_1_1">Segment Reporting Information Corporate Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="aa_SegmentReportingInformationCorporateExpenses_lbl" xml:lang="en-US" id="id_10699837_2119617_14_1">Corporate expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SegmentReportingInformationCorporateExpenses" xlink:to="aa_SegmentReportingInformationCorporateExpenses_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenses" xlink:label="aa_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenses_lbl" xml:lang="en-US" id="id_10699837_2364097_3_1">Segment reporting information depreciation depletion and amortization expense total.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenses_lbl" xml:lang="en-US" id="id_10699837_2364097_1_1">Segment Reporting Information Depreciation Depletion And Amortization Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenses_lbl" xml:lang="en-US" id="id_10699837_2364097_2_1">Depreciation, depletion, and amortization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenses" xlink:to="aa_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenses_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SegmentReportingInformationEquityInNetIncomeOfEquityMethodInvesteesOfSegments" xlink:label="aa_SegmentReportingInformationEquityInNetIncomeOfEquityMethodInvesteesOfSegments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SegmentReportingInformationEquityInNetIncomeOfEquityMethodInvesteesOfSegments_lbl" xml:lang="en-US" id="id_10699837_2219721_3_1">Equity in net income of equity method investees of segment total.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SegmentReportingInformationEquityInNetIncomeOfEquityMethodInvesteesOfSegments_lbl" xml:lang="en-US" id="id_10699837_2219721_1_1">Segment Reporting Information Equity In Net Income Of Equity Method Investees Of Segments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_SegmentReportingInformationEquityInNetIncomeOfEquityMethodInvesteesOfSegments_lbl" xml:lang="en-US" id="id_10699837_2219721_2_1">Equity (loss) income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SegmentReportingInformationEquityInNetIncomeOfEquityMethodInvesteesOfSegments" xlink:to="aa_SegmentReportingInformationEquityInNetIncomeOfEquityMethodInvesteesOfSegments_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SegmentReportingInformationImpactOfLastInFirstOut" xlink:label="aa_SegmentReportingInformationImpactOfLastInFirstOut"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SegmentReportingInformationImpactOfLastInFirstOut_lbl" xml:lang="en-US" id="id_10699837_2293623_3_1">Segment reporting information impact of last in first out.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SegmentReportingInformationImpactOfLastInFirstOut_lbl" xml:lang="en-US" id="id_10699837_2293623_1_1">Segment Reporting Information Impact Of Last In First Out</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="aa_SegmentReportingInformationImpactOfLastInFirstOut_lbl" xml:lang="en-US" id="id_10699837_2293623_14_1">Impact of LIFO</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SegmentReportingInformationImpactOfLastInFirstOut" xlink:to="aa_SegmentReportingInformationImpactOfLastInFirstOut_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SegmentReportingInformationIncomeTaxExpensesBenefits" xlink:label="aa_SegmentReportingInformationIncomeTaxExpensesBenefits"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SegmentReportingInformationIncomeTaxExpensesBenefits_lbl" xml:lang="en-US" id="id_10699837_2161342_3_1">Segment reporting information income tax expense benefit total.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SegmentReportingInformationIncomeTaxExpensesBenefits_lbl" xml:lang="en-US" id="id_10699837_2161342_1_1">Segment Reporting Information Income Tax Expenses Benefits</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_SegmentReportingInformationIncomeTaxExpensesBenefits_lbl" xml:lang="en-US" id="id_10699837_2161342_2_1">Income taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SegmentReportingInformationIncomeTaxExpensesBenefits" xlink:to="aa_SegmentReportingInformationIncomeTaxExpensesBenefits_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SegmentReportingInformationIntersegmentRevenues" xlink:label="aa_SegmentReportingInformationIntersegmentRevenues"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SegmentReportingInformationIntersegmentRevenues_lbl" xml:lang="en-US" id="id_10699837_2110947_3_1">Segment reporting information intersegment revenue total.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SegmentReportingInformationIntersegmentRevenues_lbl" xml:lang="en-US" id="id_10699837_2110947_1_1">Segment Reporting Information Intersegment Revenues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="aa_SegmentReportingInformationIntersegmentRevenues_lbl" xml:lang="en-US" id="id_10699837_2110947_14_1">Intersegment sales</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SegmentReportingInformationIntersegmentRevenues" xlink:to="aa_SegmentReportingInformationIntersegmentRevenues_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="us-gaap_SegmentReportingInformationLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xml:lang="en-US" id="id_10699837_2039533_1_1">Segment Reporting Information [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xml:lang="en-US" id="id_10699837_2039533_2_1">Segment Reporting Information [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingInformationLineItems" xlink:to="us-gaap_SegmentReportingInformationLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SegmentReportingInformationMetalPriceIncreaseDecrease" xlink:label="aa_SegmentReportingInformationMetalPriceIncreaseDecrease"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SegmentReportingInformationMetalPriceIncreaseDecrease_lbl" xml:lang="en-US" id="id_10699837_2386770_3_1">Segment reporting information metal price increase decrease.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SegmentReportingInformationMetalPriceIncreaseDecrease_lbl" xml:lang="en-US" id="id_10699837_2386770_1_1">Segment Reporting Information Metal Price Increase Decrease</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="aa_SegmentReportingInformationMetalPriceIncreaseDecrease_lbl" xml:lang="en-US" id="id_10699837_2386770_14_1">Metal price lag</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SegmentReportingInformationMetalPriceIncreaseDecrease" xlink:to="aa_SegmentReportingInformationMetalPriceIncreaseDecrease_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SegmentReportingInformationOtherIncomeExpenseNet" xlink:label="aa_SegmentReportingInformationOtherIncomeExpenseNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SegmentReportingInformationOtherIncomeExpenseNet_lbl" xml:lang="en-US" id="id_10699837_2174749_3_1">Segment reporting information other income expense net.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SegmentReportingInformationOtherIncomeExpenseNet_lbl" xml:lang="en-US" id="id_10699837_2174749_1_1">Segment Reporting Information Other Income Expense Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="aa_SegmentReportingInformationOtherIncomeExpenseNet_lbl" xml:lang="en-US" id="id_10699837_2174749_14_1">Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SegmentReportingInformationOtherIncomeExpenseNet" xlink:to="aa_SegmentReportingInformationOtherIncomeExpenseNet_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SegmentReportingInformationProfitsLosses" xlink:label="aa_SegmentReportingInformationProfitsLosses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SegmentReportingInformationProfitsLosses_lbl" xml:lang="en-US" id="id_10699837_2367451_3_1">Segment reporting information profit loss total.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SegmentReportingInformationProfitsLosses_lbl" xml:lang="en-US" id="id_10699837_2367451_1_1">Segment Reporting Information Profits Losses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_SegmentReportingInformationProfitsLosses_lbl" xml:lang="en-US" id="id_10699837_2367451_2_1">After-tax operating income (ATOI)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="aa_SegmentReportingInformationProfitsLosses_lbl" xml:lang="en-US" id="id_10699837_2367451_12_1">Total segment ATOI</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SegmentReportingInformationProfitsLosses" xlink:to="aa_SegmentReportingInformationProfitsLosses_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SegmentReportingInformationRestructuringAndOtherCharges" xlink:label="aa_SegmentReportingInformationRestructuringAndOtherCharges"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SegmentReportingInformationRestructuringAndOtherCharges_lbl" xml:lang="en-US" id="id_10699837_2312653_3_1">Segment reporting information restructuring and other charges.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SegmentReportingInformationRestructuringAndOtherCharges_lbl" xml:lang="en-US" id="id_10699837_2312653_1_1">Segment Reporting Information Restructuring And Other Charges</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="aa_SegmentReportingInformationRestructuringAndOtherCharges_lbl" xml:lang="en-US" id="id_10699837_2312653_14_1">Restructuring and other charges</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SegmentReportingInformationRestructuringAndOtherCharges" xlink:to="aa_SegmentReportingInformationRestructuringAndOtherCharges_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SegmentReportingInformationRevenuesFromExternalCustomers" xlink:label="aa_SegmentReportingInformationRevenuesFromExternalCustomers"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SegmentReportingInformationRevenuesFromExternalCustomers_lbl" xml:lang="en-US" id="id_10699837_2148803_3_1">Segment reporting information revenue from external customers total.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SegmentReportingInformationRevenuesFromExternalCustomers_lbl" xml:lang="en-US" id="id_10699837_2148803_1_1">Segment Reporting Information Revenues From External Customers</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="aa_SegmentReportingInformationRevenuesFromExternalCustomers_lbl" xml:lang="en-US" id="id_10699837_2148803_6_1">Third-party sales</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SegmentReportingInformationRevenuesFromExternalCustomers" xlink:to="aa_SegmentReportingInformationRevenuesFromExternalCustomers_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xml:lang="en-US" id="id_10699837_2036068_1_1">Selling, General and Administrative Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xml:lang="en-US" id="id_10699837_2036068_2_1">Selling, general administrative, and other expenses (P)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SellingGeneralAndAdministrativeExpense" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpense_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember_lbl" xml:lang="en-US" id="id_10699837_2040487_1_1">Selling, General and Administrative Expenses [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember_lbl" xml:lang="en-US" id="id_10699837_2040487_2_1">Selling, General Administrative, and Other Expenses [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpensesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ServiceAgreementsMember" xlink:label="us-gaap_ServiceAgreementsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ServiceAgreementsMember_lbl" xml:lang="en-US" id="id_10699837_2037697_1_1">Service Agreements [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ServiceAgreementsMember_lbl" xml:lang="en-US" id="id_10699837_2037697_2_1">Service Agreements [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ServiceAgreementsMember" xlink:to="us-gaap_ServiceAgreementsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SeveranceCosts1" xlink:label="us-gaap_SeveranceCosts1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SeveranceCosts1_lbl" xml:lang="en-US" id="id_10699837_2035717_1_1">Severance Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SeveranceCosts1_lbl" xml:lang="en-US" id="id_10699837_2035717_2_1">Severance costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeveranceCosts1" xlink:to="us-gaap_SeveranceCosts1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensation_lbl" xml:lang="en-US" id="id_10699837_2039916_1_1">Share-based Compensation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensation_lbl" xml:lang="en-US" id="id_10699837_2039916_2_1">Stock-based compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SherwinTXMember" xlink:label="aa_SherwinTXMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SherwinTXMember_lbl" xml:lang="en-US" id="id_10699837_2048239_3_1">Sherwin, TX [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SherwinTXMember_lbl" xml:lang="en-US" id="id_10699837_2048239_1_1">Sherwin, TX [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_SherwinTXMember_lbl" xml:lang="en-US" id="id_10699837_2048239_2_1">Sherwin, TX site [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShortTermBankLoansAndNotesPayable_lbl" xml:lang="en-US" id="id_10699837_2035130_2_1">Short-term borrowings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermBankLoansAndNotesPayable" xlink:to="us-gaap_ShortTermBankLoansAndNotesPayable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShorttermDebtFairValue" xlink:label="us-gaap_ShorttermDebtFairValue"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShorttermDebtFairValue_lbl" xml:lang="en-US" id="id_10699837_2038300_2_1">Short-term borrowings</label>
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    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ShutdownAndCurtailmentActionsMember" xlink:label="aa_ShutdownAndCurtailmentActionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ShutdownAndCurtailmentActionsMember_lbl" xml:lang="en-US" id="id_10699837_2112900_3_1">Shutdown And Curtailment Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ShutdownAndCurtailmentActionsMember_lbl" xml:lang="en-US" id="id_10699837_2112900_1_1">Shutdown And Curtailment Actions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ShutdownAndCurtailmentActionsMember_lbl" xml:lang="en-US" id="id_10699837_2112900_2_1">Shutdown and Curtailment Actions [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ShutdownAndCurtailmentActionsMember" xlink:to="aa_ShutdownAndCurtailmentActionsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_SR" xlink:label="country_SR"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="country_SR_lbl" xml:lang="en-US" id="id_10699837_2038721_1_1">SURINAME</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="country_SR_lbl" xml:lang="en-US" id="id_10699837_2038721_2_1">Suriname [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_SR" xlink:to="country_SR_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="us-gaap_StateAndLocalJurisdictionMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StateAndLocalJurisdictionMember_lbl" xml:lang="en-US" id="id_10699837_2037951_1_1">State and Local Jurisdiction [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StateAndLocalJurisdictionMember_lbl" xml:lang="en-US" id="id_10699837_2037951_2_1">State and Local Jurisdiction [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StateAndLocalJurisdictionMember" xlink:to="us-gaap_StateAndLocalJurisdictionMember_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xml:lang="en-US" id="id_10699837_2037188_1_1">Segments [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xml:lang="en-US" id="id_10699837_2037188_2_1">Segments [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_StatementBusinessSegmentsAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xml:lang="en-US" id="id_10699837_2039549_1_1">Class of Stock [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xml:lang="en-US" id="id_10699837_2039549_2_1">Class of Stock [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_StatementClassOfStockAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xml:lang="en-US" id="id_10699837_2040323_1_1">Equity Components [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xml:lang="en-US" id="id_10699837_2040323_2_1">Equity Components [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_StatementEquityComponentsAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="us-gaap_StatementGeographicalAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementGeographicalAxis_lbl" xml:lang="en-US" id="id_10699837_2039550_1_1">Geographical [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementGeographicalAxis_lbl" xml:lang="en-US" id="id_10699837_2039550_2_1">Geographical [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementGeographicalAxis" xlink:to="us-gaap_StatementGeographicalAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementLineItems_lbl" xml:lang="en-US" id="id_10699837_2039551_1_1">Statement [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementLineItems_lbl" xml:lang="en-US" id="id_10699837_2039551_2_1">Statement [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xml:lang="en-US" id="id_10699837_2038498_1_1">Statement of Cash Flows [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xml:lang="en-US" id="id_10699837_2038498_2_1">Statement of Cash Flows [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xml:lang="en-US" id="id_10699837_2039336_1_1">Statement of Financial Position [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xml:lang="en-US" id="id_10699837_2039336_2_1">Statement of Financial Position [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_StatementOfFinancialPositionAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" xml:lang="en-US" id="id_10699837_2035883_1_1">Statement of Comprehensive Income [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" xml:lang="en-US" id="id_10699837_2035883_2_1">Statement of Comprehensive Income [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:to="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_10699837_2040324_1_1">Statement of Stockholders' Equity [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_10699837_2040324_2_1">Statement of Stockholders' Equity [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_StatementOfStockholdersEquityAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="us-gaap_StatementScenarioAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementScenarioAxis_lbl" xml:lang="en-US" id="id_10699837_2039338_1_1">Scenario [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementScenarioAxis_lbl" xml:lang="en-US" id="id_10699837_2039338_2_1">Scenario [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementScenarioAxis" xlink:to="us-gaap_StatementScenarioAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementTable_lbl" xml:lang="en-US" id="id_10699837_2038726_1_1">Statement [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementTable_lbl" xml:lang="en-US" id="id_10699837_2038726_2_1">Statement [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquity_lbl" xml:lang="en-US" id="id_10699837_2035141_1_1">Stockholders' Equity Attributable to Parent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_StockholdersEquity_lbl" xml:lang="en-US" id="id_10699837_2035141_6_1">Total Alcoa shareholders' equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_10699837_2035553_1_1">Stockholders' Equity Attributable to Parent [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_10699837_2035553_2_1">Alcoa shareholders' equity:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US" id="id_10699837_2036787_1_1">Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US" id="id_10699837_2036787_4_1">Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US" id="id_10699837_2036787_5_1">Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US" id="id_10699837_2036787_6_1">Total equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl" xml:lang="en-US" id="id_10699837_2036286_1_1">Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl" xml:lang="en-US" id="id_10699837_2036286_2_1">EQUITY</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquityOther" xlink:label="us-gaap_StockholdersEquityOther"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityOther_lbl" xml:lang="en-US" id="id_10699837_2035144_1_1">Stockholders' Equity, Other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_StockholdersEquityOther_lbl" xml:lang="en-US" id="id_10699837_2035144_14_1">Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityOther" xlink:to="us-gaap_StockholdersEquityOther_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquityReverseStockSplit" xlink:label="us-gaap_StockholdersEquityReverseStockSplit"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockholdersEquityReverseStockSplit_lbl" xml:lang="en-US" id="id_10699837_2036458_2_1">Reverse stock split description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityReverseStockSplit" xlink:to="us-gaap_StockholdersEquityReverseStockSplit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xml:lang="en-US" id="id_10699837_2035556_1_1">Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xml:lang="en-US" id="id_10699837_2035556_2_1">Common stock issued: compensation plans</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:to="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="us-gaap_SubsequentEventLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xml:lang="en-US" id="id_10699837_2035892_1_1">Subsequent Event [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xml:lang="en-US" id="id_10699837_2035892_2_1">Subsequent Event [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_SubsequentEventLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="us-gaap_SubsequentEventMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventMember_lbl" xml:lang="en-US" id="id_10699837_2039759_1_1">Subsequent Event [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventMember_lbl" xml:lang="en-US" id="id_10699837_2039759_2_1">Subsequent Event [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventMember" xlink:to="us-gaap_SubsequentEventMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="us-gaap_SubsequentEventsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xml:lang="en-US" id="id_10699837_2039760_1_1">Subsequent Events [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xml:lang="en-US" id="id_10699837_2039760_2_1">Subsequent Events [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsAbstract" xlink:to="us-gaap_SubsequentEventsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="us-gaap_SubsequentEventsTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xml:lang="en-US" id="id_10699837_2040768_1_1">Subsequent Events [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xml:lang="en-US" id="id_10699837_2040768_2_1">Subsequent Events</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsTextBlock" xlink:to="us-gaap_SubsequentEventsTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="us-gaap_SubsequentEventTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTable_lbl" xml:lang="en-US" id="id_10699837_2039938_1_1">Subsequent Event [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventTable_lbl" xml:lang="en-US" id="id_10699837_2039938_2_1">Subsequent Event [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_SubsequentEventTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xml:lang="en-US" id="id_10699837_2037362_1_1">Subsequent Event Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xml:lang="en-US" id="id_10699837_2037362_2_1">Subsequent Event Type [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xml:lang="en-US" id="id_10699837_2039761_1_1">Subsequent Event Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xml:lang="en-US" id="id_10699837_2039761_2_1">Subsequent Event Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="us-gaap_SubsidiariesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsidiariesMember_lbl" xml:lang="en-US" id="id_10699837_2036789_1_1">Subsidiaries [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsidiariesMember_lbl" xml:lang="en-US" id="id_10699837_2036789_2_1">Majority-Owned Subsidiary</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsidiariesMember" xlink:to="us-gaap_SubsidiariesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SummaryOfStatementOfOperationsInformationForEquityInvestmentsTableTextBlock" xlink:label="aa_SummaryOfStatementOfOperationsInformationForEquityInvestmentsTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SummaryOfStatementOfOperationsInformationForEquityInvestmentsTableTextBlock_lbl" xml:lang="en-US" id="id_10699837_2386771_3_1">Summary of Statement of Operations Information for Equity Investments [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SummaryOfStatementOfOperationsInformationForEquityInvestmentsTableTextBlock_lbl" xml:lang="en-US" id="id_10699837_2386771_1_1">Summary Of Statement Of Operations Information For Equity Investments [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_SummaryOfStatementOfOperationsInformationForEquityInvestmentsTableTextBlock_lbl" xml:lang="en-US" id="id_10699837_2386771_2_1">Summary of Unaudited Financial Information for Alcoa's Equity Investments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SummaryOfStatementOfOperationsInformationForEquityInvestmentsTableTextBlock" xlink:to="aa_SummaryOfStatementOfOperationsInformationForEquityInvestmentsTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_SupplierAndCustomerContractMember" xlink:label="aa_SupplierAndCustomerContractMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_SupplierAndCustomerContractMember_lbl" xml:lang="en-US" id="id_10699837_2193896_3_1">Supplier and customer contract.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_SupplierAndCustomerContractMember_lbl" xml:lang="en-US" id="id_10699837_2193896_1_1">Supplier And Customer Contract [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_SupplierAndCustomerContractMember_lbl" xml:lang="en-US" id="id_10699837_2193896_2_1">Supplier and Customer Contract [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_SupplierAndCustomerContractMember" xlink:to="aa_SupplierAndCustomerContractMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_TaxCreditPreviouslyClaimedAndDisallowedByTaxAuthority" xlink:label="aa_TaxCreditPreviouslyClaimedAndDisallowedByTaxAuthority"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_TaxCreditPreviouslyClaimedAndDisallowedByTaxAuthority_lbl" xml:lang="en-US" id="id_10699837_2051604_3_1">Tax credit previously claimed and disallowed by tax authority.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_TaxCreditPreviouslyClaimedAndDisallowedByTaxAuthority_lbl" xml:lang="en-US" id="id_10699837_2051604_1_1">Tax Credit Previously Claimed and Disallowed by Tax Authority</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_TaxCreditPreviouslyClaimedAndDisallowedByTaxAuthority_lbl" xml:lang="en-US" id="id_10699837_2051604_2_1">Disallowed tax credits</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_TaxCreditPreviouslyClaimedAndDisallowedByTaxAuthority" xlink:to="aa_TaxCreditPreviouslyClaimedAndDisallowedByTaxAuthority_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TaxesPayableCurrent" xlink:label="us-gaap_TaxesPayableCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxesPayableCurrent_lbl" xml:lang="en-US" id="id_10699837_2036299_1_1">Taxes Payable, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxesPayableCurrent_lbl" xml:lang="en-US" id="id_10699837_2036299_2_1">Taxes, including income taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxesPayableCurrent" xlink:to="us-gaap_TaxesPayableCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TextBlockAbstract" xlink:label="us-gaap_TextBlockAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TextBlockAbstract_lbl" xml:lang="en-US" id="id_10699837_2033750_1_1">Text Block [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TextBlockAbstract_lbl" xml:lang="en-US" id="id_10699837_2033750_2_1">Text Block [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TextBlockAbstract" xlink:to="us-gaap_TextBlockAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ThirdPartySalesMember" xlink:label="aa_ThirdPartySalesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ThirdPartySalesMember_lbl" xml:lang="en-US" id="id_10699837_2188836_3_1">Third party sales.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ThirdPartySalesMember_lbl" xml:lang="en-US" id="id_10699837_2188836_1_1">Third Party Sales [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ThirdPartySalesMember_lbl" xml:lang="en-US" id="id_10699837_2188836_2_1">Third-Party Sales [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ThirdPartySalesMember" xlink:to="aa_ThirdPartySalesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_ThreeYearEquityCallPlanMember" xlink:label="aa_ThreeYearEquityCallPlanMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_ThreeYearEquityCallPlanMember_lbl" xml:lang="en-US" id="id_10699837_2311887_3_1">Three-year equity call plan.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_ThreeYearEquityCallPlanMember_lbl" xml:lang="en-US" id="id_10699837_2311887_1_1">Three Year Equity Call Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_ThreeYearEquityCallPlanMember_lbl" xml:lang="en-US" id="id_10699837_2311887_2_1">Three-Year Equity Call Plan [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_ThreeYearEquityCallPlanMember" xlink:to="aa_ThreeYearEquityCallPlanMember_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_TitalMember" xlink:label="aa_TitalMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_TitalMember_lbl" xml:lang="en-US" id="id_10699837_2122509_3_1">TITAL.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_TitalMember_lbl" xml:lang="en-US" id="id_10699837_2122509_1_1">TITAL [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_TitalMember_lbl" xml:lang="en-US" id="id_10699837_2122509_2_1">TITAL [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_TitalMember" xlink:to="aa_TitalMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_TradingSymbol_lbl" xml:lang="en-US" id="id_10699837_2038518_1_1">Trading Symbol</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_TradingSymbol_lbl" xml:lang="en-US" id="id_10699837_2038518_2_1">Trading Symbol</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TransfersAndServicingAbstract" xlink:label="us-gaap_TransfersAndServicingAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TransfersAndServicingAbstract_lbl" xml:lang="en-US" id="id_10699837_2036645_1_1">Transfers and Servicing [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TransfersAndServicingAbstract_lbl" xml:lang="en-US" id="id_10699837_2036645_2_1">Transfers and Servicing [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TransfersAndServicingAbstract" xlink:to="us-gaap_TransfersAndServicingAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock" xlink:label="us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock_lbl" xml:lang="en-US" id="id_10699837_2037558_1_1">Transfers and Servicing of Financial Assets [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock_lbl" xml:lang="en-US" id="id_10699837_2037558_2_1">Receivables</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock" xlink:to="us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_TranslationAdjustmentFunctionalToAcquisitionIncreaseDecreaseGrossOfTax" xlink:label="aa_TranslationAdjustmentFunctionalToAcquisitionIncreaseDecreaseGrossOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_TranslationAdjustmentFunctionalToAcquisitionIncreaseDecreaseGrossOfTax_lbl" xml:lang="en-US" id="id_10699837_2392065_3_1">Translation adjustment functional to acquisition, increase (decrease), gross of tax.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_TranslationAdjustmentFunctionalToAcquisitionIncreaseDecreaseGrossOfTax_lbl" xml:lang="en-US" id="id_10699837_2392065_1_1">Translation Adjustment Functional to Acquisition, Increase (Decrease), Gross of Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_TranslationAdjustmentFunctionalToAcquisitionIncreaseDecreaseGrossOfTax_lbl" xml:lang="en-US" id="id_10699837_2392065_2_1">Increase (Decrease) in reserves due to effects of Acquisition</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="aa_TranslationAdjustmentFunctionalToAcquisitionIncreaseDecreaseGrossOfTax" xlink:to="aa_TranslationAdjustmentFunctionalToAcquisitionIncreaseDecreaseGrossOfTax_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyIncreaseDecreaseGrossOfTax" xlink:label="us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyIncreaseDecreaseGrossOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyIncreaseDecreaseGrossOfTax_lbl" xml:lang="en-US" id="id_10699837_2033756_1_1">Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyIncreaseDecreaseGrossOfTax_lbl" xml:lang="en-US" id="id_10699837_2033756_2_1">Increase (Decrease) in reserves due to effects of foreign currency translation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyIncreaseDecreaseGrossOfTax" xlink:to="us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyIncreaseDecreaseGrossOfTax_lbl"/>
    <loc xlink:type="locator" xlink:href="aa-20160630.xsd#aa_TransportationAndConstructionSolutionsMember" xlink:label="aa_TransportationAndConstructionSolutionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="aa_TransportationAndConstructionSolutionsMember_lbl" xml:lang="en-US" id="id_10699837_2196657_3_1">Transportation and construction solutions.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="aa_TransportationAndConstructionSolutionsMember_lbl" xml:lang="en-US" id="id_10699837_2196657_1_1">Transportation And Construction Solutions [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="aa_TransportationAndConstructionSolutionsMember_lbl" xml:lang="en-US" id="id_10699837_2196657_2_1">Transportation and Construction Solutions [Member]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="us-gaap_TreasuryStockMember"/>
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