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v2.4.1.9

Derivative Instruments and Hedging Activities (Assets and Liabilities - Current vs. Noncurrent Derivative instruments) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Current | $ 77 us-gaap_DerivativeAssetsCurrent | $ 32 us-gaap_DerivativeAssetsCurrent
Derivative Liability, Current | 148 us-gaap_DerivativeLiabilitiesCurrent | 157 us-gaap_DerivativeLiabilitiesCurrent
Derivative Asset, Noncurrent | 203 us-gaap_DerivativeAssetsNoncurrent | 208 us-gaap_DerivativeAssetsNoncurrent
Derivative Liability, Noncurrent | 366 us-gaap_DerivativeLiabilitiesNoncurrent | 214 us-gaap_DerivativeLiabilitiesNoncurrent
Total asset derivatives | 280 us-gaap_DerivativeFairValueOfDerivativeAsset | 240 us-gaap_DerivativeFairValueOfDerivativeAsset
Total liability derivatives | 514 us-gaap_DerivativeFairValueOfDerivativeLiability | 371 us-gaap_DerivativeFairValueOfDerivativeLiability
Asset, Formerly Accounted for as a Derivative, to be Amortized into Earnings | 161 aes_AssetFormerlyAccountedforasaDerivativetobeAmortizedintoEarnings | 169 aes_AssetFormerlyAccountedforasaDerivativetobeAmortizedintoEarnings
Liability, Formerly Accounted for as a Derivative, to be Amortized into Earnings | 180 aes_LiabilityFormerlyAccountedforasaDerivativetobeAmortizedintoEarnings | 190 aes_LiabilityFormerlyAccountedforasaDerivativetobeAmortizedintoEarnings
Contracts Subject To Netting Arrangements |  |
Derivatives, Fair Value [Line Items] |  |
Total asset derivatives | 53 us-gaap_DerivativeFairValueOfDerivativeAsset / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | 91 us-gaap_DerivativeFairValueOfDerivativeAsset / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Total liability derivatives | 507 us-gaap_DerivativeFairValueOfDerivativeLiability / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | 314 us-gaap_DerivativeFairValueOfDerivativeLiability / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Derivative Assets Not Offset Under Netting Arrangements | (10)aes_DerivativeAssetsNotOffsetUnderNettingArrangements / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | (9)aes_DerivativeAssetsNotOffsetUnderNettingArrangements / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Derivative Liabilities Not Offset Under Netting Arrangements | (10)aes_DerivativeLiabilitiesNotOffsetUnderNettingArrangements / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | (9)aes_DerivativeLiabilitiesNotOffsetUnderNettingArrangements / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 0 us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | (3)us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (5)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | (6)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Derivative Asset | 43 us-gaap_DerivativeAssets / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | 79 us-gaap_DerivativeAssets / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember
Derivative Liability | $ 492 us-gaap_DerivativeLiabilities / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember | $ 299 us-gaap_DerivativeLiabilities / aes_NettingArrangementsAxis = aes_ContractsSubjectToNettingArrangementsMember

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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 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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