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Derivative Instruments and Hedging Activities - Part 4 (Details) (USD $) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2014 | Mar. 31, 2015 | Dec. 31, 2014
Credit Risk-Related Contingent Features [Line Items] |  |  |
Gain on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring | $ 0 us-gaap_GainOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring |  |
DPL Subsidiary [Member] |  |  |
Credit Risk-Related Contingent Features [Line Items] |  |  |
Net liability position, derivative transactions |  | 21,000,000 us-gaap_DerivativeNetLiabilityPositionAggregateFairValue / dei_LegalEntityAxis = aes_DplSubsidiaryMember | 12,000,000 us-gaap_DerivativeNetLiabilityPositionAggregateFairValue / dei_LegalEntityAxis = aes_DplSubsidiaryMember
Collateral posted for derivative transactions |  | 11,000,000 us-gaap_CollateralAlreadyPostedAggregateFairValue / dei_LegalEntityAxis = aes_DplSubsidiaryMember | 5,000,000 us-gaap_CollateralAlreadyPostedAggregateFairValue / dei_LegalEntityAxis = aes_DplSubsidiaryMember
Cash Collateral Received From Counterparties |  | $ 0 aes_CashCollateralReceivedFromCounterparties / dei_LegalEntityAxis = aes_DplSubsidiaryMember | $ 0 aes_CashCollateralReceivedFromCounterparties / dei_LegalEntityAxis = aes_DplSubsidiaryMember

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- Definition The aggregated amount of cash collateral received from counterparties to our derivative positions, which is classified as restricted cash. + References No definition available. + Details
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Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624258-113959 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_CreditDerivativesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624258-113959 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of gain reclassified into earnings in the period when cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |