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Discontinued Operations And Held-For-Sale Businesses (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		7 Months Ended	0 Months Ended		1 Months Ended	3 Months Ended	1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2014	Feb. 24, 2014	Jan. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Nov. 30, 2013 MW	Sep. 30, 2013	Oct. 30, 2013 MW	Sep. 30, 2014 business
Discontinued Operations Income Loss
Revenue	$ 0aes_RevenueFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax	$ 129aes_RevenueFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax
Income from operations of discontinued businesses, before income tax	0us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax	34us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax
Income tax expense	0us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod	(14)us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod
Income from operations of discontinued businesses, after income tax	0us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	20us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Impairment expenses	8us-gaap_AssetImpairmentCharges	166us-gaap_AssetImpairmentCharges
Net loss from disposal and impairments of discontinued businesses, after income tax	0us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	(43)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Sonel [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sale of ownership in subsidiary percent									56.00%aes_DivestitureOfOwnershipInSubsidiaryPercent / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_SonelMember
Kribi [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sale of ownership in subsidiary percent									56.00%aes_DivestitureOfOwnershipInSubsidiaryPercent / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_KribiMember
Dibamba [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sale of ownership in subsidiary percent									56.00%aes_DivestitureOfOwnershipInSubsidiaryPercent / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_DibambaMember
Cameroon [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Impairment expenses			101us-gaap_AssetImpairmentCharges / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_CameroonMember
Carrying amount		435us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_CameroonMember	435us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_CameroonMember
Fair value less costs to sell		334aes_FairValueLessCostsToSell / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_CameroonMember	334aes_FairValueLessCostsToSell / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_CameroonMember
Saurashtra [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net proceeds received from sale of businesses				8us-gaap_ProceedsFromDivestitureOfBusinesses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_SaurashtraMember
Generation capacity mega watts										39aes_GenerationCapacityMegaWatts / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_SaurashtraMember
US Wind Projects [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sale of ownership in subsidiary percent								100.00%aes_DivestitureOfOwnershipInSubsidiaryPercent / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_USWindProjectsMember
Net proceeds received from sale of businesses					27us-gaap_ProceedsFromDivestitureOfBusinesses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_USWindProjectsMember
Generation capacity mega watts								234aes_GenerationCapacityMegaWatts / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_USWindProjectsMember
Number of wind projects								3aes_NumberofWindProjects / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_USWindProjectsMember
Deferred proceeds from divestiture of businesses					3aes_DeferredProceedsFromDivestitureOfBusinesses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_USWindProjectsMember
Disposal Group, Including Discontinued Operation, Gross Profit (Loss)	4us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_USWindProjectsMember	3us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_USWindProjectsMember
Cameroon [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of Equity Interests Sold											3aes_NumberofEquityInterestsSold / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember
Disposal Group, Including Discontinued Operation, Consideration						200us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember	200us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember
Letter of Credit Related to Sale Agreement	40aes_LetterofCreditRelatedtoSaleAgreement / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember
Net proceeds received from sale of businesses						156us-gaap_ProceedsFromDivestitureOfBusinesses / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember
Net loss from disposal and impairments of discontinued businesses, after income tax							(7)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember
Armenia Mountain [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Generation capacity mega watts								101aes_GenerationCapacityMegaWatts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_ArmeniaMountainMember
Buyer option to purchase ownership percent								100.00%aes_SaleAgreementBuyerOptionToPurchaseOwnershipPercent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_ArmeniaMountainMember
Buyer option to purchase ownership interest, sales price								75aes_SaleAgreementBuyerOptionToPurchaseOwnershipInterestSalesPrice / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_ArmeniaMountainMember
Noncurrent Asset [Member] | Cameroon [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Non-contingent Consideration, Fair Value, Amount to be Received						44aes_DisposalGroupIncludingDiscontinuedOperationNoncontingentConsiderationFairValueAmounttobeReceived / us-gaap_BalanceSheetLocationAxis = aes_NoncurrentAssetMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember	44aes_DisposalGroupIncludingDiscontinuedOperationNoncontingentConsiderationFairValueAmounttobeReceived / us-gaap_BalanceSheetLocationAxis = aes_NoncurrentAssetMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember
Carrying amount	$ 44us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount / us-gaap_BalanceSheetLocationAxis = aes_NoncurrentAssetMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember

X

- Definition

Deferred Proceeds From Divestiture Of Businesses

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X

- Definition

Represents the Company's percentage ownership interest in the subsidiary being divested.

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X

- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value less costs to sell by the entity.

+ References

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Generation Capacity Mega Watts

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- Definition

Letter of Credit Related to Sale Agreement

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X

- Definition

Number of Equity Interests Sold

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- Definition

Number of Wind Projects

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- Definition

Revenue from operations of a business component (exclusive of any gain or loss on disposal, or provision therefore) during the reporting period, until its disposal

+ References

No definition available.

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- Definition

Sale Agreement, Buyer Option To Purchase Ownership Interest, Sales Price

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- Definition

Sale Agreement, Buyer Option To Purchase Ownership Percent

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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- Definition

Pretax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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After tax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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Income tax expense or benefit attributable to Income or Loss from discontinued operations during the phase-out period.

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- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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No definition available.

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- Definition

Amount of gross profit attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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This element represents the carrying (reported) amount of the entity's investments as of the balance sheet date. This amount may represent the individual investment's or group of similar investments' original cost, fair value, or such other amount at which the investment is shown in the entity's balance sheet.

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