XML 95 R62.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Restructuring and Other Charges - 2016 Actions (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) employee position | Dec. 31, 2016 USD ($) | Dec. 31, 2016 facility | Dec. 31, 2016 employee | Dec. 31, 2016 position | Dec. 31, 2015 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges | $ 165 | $ 155 |  |  |  | $ 214
Restructuring and other charges after tax | $ 143 | 114 |  |  |  | 192
Number of employees associated with layoff costs | position | 880 |  |  |  |  |
Layoff costs | $ 64 | 70 |  |  |  | 97
United Kingdom |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of employees associated with layoff costs | employee |  |  |  | 60 |  |
Other exit costs |  | 4 |  |  |  |
Layoff costs |  | 2 |  |  |  |
Tennessee | Alcoa Corporation | Toll Processing and Services Agreement |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges |  | 21 |  |  |  |
Number of employees associated with layoff costs | position |  |  |  |  | 145 |
Other exit costs |  | 9 |  |  |  |
Layoff costs |  | 7 |  |  |  |
RTI |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges |  | 3 |  |  |  |
Restructuring and other charges after tax |  | 2 |  |  |  |
Engineered Products and Solutions |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of employees associated with layoff costs | position | 400 |  |  |  |  |
Global Rolled Products |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of employees associated with layoff costs | position | 245 |  |  |  |  |
Transportation and Construction Solutions |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of employees associated with layoff costs | position | 135 |  |  |  |  |
Corporate |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges | $ 11 | 23 |  |  |  | 39
Number of employees associated with layoff costs | position | 100 |  |  |  |  |
Other exit costs |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges | $ 69 | 57 |  |  |  |
Restructuring and other charges after tax | $ 47 | 46 |  |  |  |
Other exit costs | Tennessee | Alcoa Corporation | Toll Processing and Services Agreement |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Other exit costs |  | 2 |  |  |  |
Shutdown and Curtailment Actions |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges |  | 37 |  |  |  |
Restructuring and other charges after tax |  | 24 |  |  |  |
Closure Of Five Facility |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges |  | 20 |  |  |  |
Restructuring and other charges after tax |  | 14 |  |  |  |
Number of facilities closed | facility |  |  | 5 |  |  |
Number of employees associated with layoff costs | position |  |  |  |  | 280 |
Restructuring Programs Layoffs 2016 |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges |  | 53 |  |  |  |
Restructuring and other charges after tax |  | 33 |  |  |  |
Number of employees associated with layoff costs | 1,700 |  |  | 1,750 | 1,315 |
Approximate number of employees already laid off | employee | 1,280 |  |  |  |  |
Restructuring charges for layoffs | $ 26 | 16 |  |  |  |
Restructuring Programs Layoffs 2016 | Engineered Products and Solutions |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of employees associated with layoff costs | position |  |  |  |  | 1,045 |
Restructuring Programs Layoffs 2016 | Global Rolled Products |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of employees associated with layoff costs | position |  |  |  |  | 30 |
Restructuring Programs Layoffs 2016 | Transportation and Construction Solutions |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of employees associated with layoff costs | position |  |  |  |  | 30 |
Restructuring Programs Layoffs 2016 | Corporate |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Number of employees associated with layoff costs | position |  |  |  |  | 210 |
Other Miscellaneous Charges |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges | 12 | 11 |  |  |  | 7
Restructuring and other charges after tax |  | 8 |  |  |  | 4
Pension Settlement Cost |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges |  | 2 |  |  |  |
Restructuring and other charges after tax |  | 1 |  |  |  |
Other Adjustments |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges | $ (11) | 25 |  |  |  | 8
Restructuring and other charges after tax |  | 12 |  |  |  | $ 3
Asset Impairment and Accelerated Depreciation | United Kingdom |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges |  | 51 |  |  |  |
Asset Retirement Obligations | Tennessee | Alcoa Corporation | Toll Processing and Services Agreement |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Other exit costs |  | 4 |  |  |  |
Environmental Remediation |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and other charges |  | 2 |  |  |  |
Environmental Remediation | Tennessee | Alcoa Corporation | Toll Processing and Services Agreement |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Other exit costs |  | $ 3 |  |  |  |

X
- Definition Number Of Facilities Closed + References No definition available. + Details
Name: | arnc_NumberOfFacilitiesClosed
Namespace Prefix: | arnc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Restructuring and other charges after tax. + References No definition available. + Details
Name: | arnc_RestructuringAndOtherChargesAfterTax
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Restructuring charge for layoffs. + References No definition available. + Details
Name: | arnc_RestructuringChargeForLayoffs
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
Name: | us-gaap_OtherRestructuringCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of positions eliminated during the period as a result of restructuring activities. + References No definition available. + Details
Name: | us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of positions eliminated as of the balance sheet date since inception of the restructuring plan(s). + References No definition available. + Details
Name: | us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
Name: | us-gaap_RestructuringCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 + Details
Name: | us-gaap_SeveranceCosts1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=stpr_TN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=arnc_AlcoaCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=arnc_TollProcessingAndServicesAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=arnc_RTIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=arnc_EngineeredProductsAndSolutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=arnc_GlobalRolledProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=arnc_TransportationAndConstructionSolutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=arnc_OtherExitCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=arnc_ShutdownAndCurtailmentActionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=arnc_ClosureOfFiveFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=arnc_RestructuringProgramsLayoffsTwoThousandSixteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=arnc_OtherMiscellaneousChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=arnc_PensionSettlementCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=arnc_OtherAdjustmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=arnc_AssetImpairmentAndAcceleratedDepreciationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=arnc_AssetRetirementObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=arnc_EnvironmentalRemediationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |