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Derivative Instruments and Hedging Activities - Part 2 (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Assets |  |
Derivative Assets, Gross | $ 307 us-gaap_DerivativeFairValueOfDerivativeAsset | $ 280 us-gaap_DerivativeFairValueOfDerivativeAsset
Liabilities |  |
Derivative Liabilities, Gross | 596 us-gaap_DerivativeFairValueOfDerivativeLiability | 514 us-gaap_DerivativeFairValueOfDerivativeLiability
Asset, Formerly Accounted for as a Derivative, to be Amortized into Earnings | 155 aes_AssetFormerlyAccountedforasaDerivativetobeAmortizedintoEarnings | 161 aes_AssetFormerlyAccountedforasaDerivativetobeAmortizedintoEarnings
Liability, Formerly Accounted for as a Derivative, to be Amortized into Earnings | 177 aes_LiabilityFormerlyAccountedforasaDerivativetobeAmortizedintoEarnings | 180 aes_LiabilityFormerlyAccountedforasaDerivativetobeAmortizedintoEarnings
Subject to netting arrangement [Member] |  |
Assets |  |
Derivative Assets, Gross | 42 us-gaap_DerivativeFairValueOfDerivativeAsset / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | 53 us-gaap_DerivativeFairValueOfDerivativeAsset / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Derivative Assets Not Offset Under Netting Arrangements | (11)aes_DerivativeAssetsNotOffsetUnderNettingArrangements / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | (10)aes_DerivativeAssetsNotOffsetUnderNettingArrangements / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Derivative Assets Not Offset By Collateral | 0 us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | 0 us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Derivative Assets, Net | 31 us-gaap_DerivativeAssets / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | 43 us-gaap_DerivativeAssets / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Liabilities |  |
Derivative Liabilities, Gross | 524 us-gaap_DerivativeFairValueOfDerivativeLiability / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | 507 us-gaap_DerivativeFairValueOfDerivativeLiability / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Derivative Liabilities Not Offset Under Netting Arrangements | (11)aes_DerivativeLiabilitiesNotOffsetUnderNettingArrangements / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | (10)aes_DerivativeLiabilitiesNotOffsetUnderNettingArrangements / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Derivative Liabilities Not Offset By Collateral | (11)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | (5)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Derivative Liabilities, Net | 502 us-gaap_DerivativeLiabilities / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | 492 us-gaap_DerivativeLiabilities / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Current [Member] |  |
Assets |  |
Derivative Assets, Gross | 76 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = aes_CurrentMember | 77 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = aes_CurrentMember
Liabilities |  |
Derivative Liabilities, Gross | 152 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = aes_CurrentMember | 148 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = aes_CurrentMember
Noncurrent [Member] |  |
Assets |  |
Derivative Assets, Gross | 231 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = aes_NoncurrentMember | 203 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_BalanceSheetLocationAxis = aes_NoncurrentMember
Liabilities |  |
Derivative Liabilities, Gross | 444 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = aes_NoncurrentMember | 366 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_BalanceSheetLocationAxis = aes_NoncurrentMember
Designated as Hedging Instruments [Member] |  |
Assets |  |
Derivative Assets, Gross | 39 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 31 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Liabilities |  |
Derivative Liabilities, Gross | 554 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 490 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Not Designated as Hedging Instruments [Member] |  |
Assets |  |
Derivative Assets, Gross | 268 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 249 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Liabilities |  |
Derivative Liabilities, Gross | 42 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 24 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Interest rate derivatives [Member] |  |
Liabilities |  |
Derivative Liabilities, Gross | 469 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateContractMember | 416 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateContractMember
Interest rate derivatives [Member] | Designated as Hedging Instruments [Member] |  |
Liabilities |  |
Derivative Liabilities, Gross | 469 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateContractMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 416 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateContractMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Interest rate derivatives [Member] | Not Designated as Hedging Instruments [Member] |  |
Liabilities |  |
Derivative Liabilities, Gross | 0 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 0 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Cross currency derivatives [Member] |  |
Liabilities |  |
Derivative Liabilities, Gross | 33 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CrossCurrencyInterestRateContractMember | 29 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CrossCurrencyInterestRateContractMember
Cross currency derivatives [Member] | Designated as Hedging Instruments [Member] |  |
Liabilities |  |
Derivative Liabilities, Gross | 33 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CrossCurrencyInterestRateContractMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 29 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CrossCurrencyInterestRateContractMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Cross currency derivatives [Member] | Not Designated as Hedging Instruments [Member] |  |
Liabilities |  |
Derivative Liabilities, Gross | 0 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CrossCurrencyInterestRateContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 0 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CrossCurrencyInterestRateContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Foreign currency derivatives [Member] |  |
Assets |  |
Derivative Assets, Gross | 261 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember | 236 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember
Liabilities |  |
Derivative Liabilities, Gross | 66 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember | 52 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember
Foreign currency derivatives [Member] | Designated as Hedging Instruments [Member] |  |
Assets |  |
Derivative Assets, Gross | 9 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 6 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Liabilities |  |
Derivative Liabilities, Gross | 40 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 38 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Foreign currency derivatives [Member] | Not Designated as Hedging Instruments [Member] |  |
Assets |  |
Derivative Assets, Gross | 252 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 230 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Liabilities |  |
Derivative Liabilities, Gross | 26 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 14 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Commodity Contract [Member] |  |
Assets |  |
Derivative Assets, Gross | 46 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember | 44 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember
Liabilities |  |
Derivative Liabilities, Gross | 28 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember | 17 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember
Commodity Contract [Member] | Designated as Hedging Instruments [Member] |  |
Assets |  |
Derivative Assets, Gross | 30 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 25 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Liabilities |  |
Derivative Liabilities, Gross | 12 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 7 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Commodity Contract [Member] | Not Designated as Hedging Instruments [Member] |  |
Assets |  |
Derivative Assets, Gross | 16 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | 19 us-gaap_DerivativeFairValueOfDerivativeAsset / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember
Liabilities |  |
Derivative Liabilities, Gross | $ 16 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember | $ 10 us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember

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- Definition Asset, Formerly Accounted for as a Derivative, to be Amortized into Earnings + References No definition available. + Details
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- Definition Represents the fair value of derivative assets that could have been offset under master netting arrangements but were not, in accordance with company policy. + References No definition available. + Details
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- Definition Represents the fair value of derivative liabilities that could have been offset under master netting arrangements but were not, in accordance with company policy. + References No definition available. + Details
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- Definition Liability, Formerly Accounted for as a Derivative, to be Amortized into Earnings + References No definition available. + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13495-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226008-175313 + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226000-175313 + Details
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- Definition Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226008-175313 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226006-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35706170&loc=d3e41678-113959 + Details
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