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Discontinued Operations and Held-For-Sale Businesses (Schedule of Disposal Groups, Including Discontinued Operations) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]      
Revenue $ 233aes_RevenueFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax $ 689aes_RevenueFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax $ 1,043aes_RevenueFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax
Income (loss) from operations of discontinued businesses, before income tax 50us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax (3)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax 73us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax
Income tax expense (23)us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod (24)us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod (26)us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod
Income (loss) from operations of discontinued businesses, after income tax 27us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax (27)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax 47us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
Net gain (loss) from disposal and impairments of discontinued businesses, after income tax $ (56)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax $ (152)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax $ 16us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax