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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 | $ 0 aes_RevenueFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax | $ 129 aes_RevenueFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax |  |  |  |  |  |  |  |  |
Income from operations of discontinued businesses, before income tax | 0 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax | 34 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax |  |  |  |  |  |  |  |  |
Income tax expense | 0 us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod | (14)us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod |  |  |  |  |  |  |  |  |
Income from operations of discontinued businesses, after income tax | 0 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | 20 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax |  |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment expenses | 8 us-gaap_AssetImpairmentCharges | 166 us-gaap_AssetImpairmentCharges |  |  |  |  |  |  |  |  |
Net loss from disposal and impairments of discontinued businesses, after income tax | 0 us-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 |  |  | 101 us-gaap_AssetImpairmentCharges / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_CameroonMember |  |  |  |  |  |  |  |
Carrying amount |  | 435 us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_CameroonMember | 435 us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_CameroonMember |  |  |  |  |  |  |  |
Fair value less costs to sell |  | 334 aes_FairValueLessCostsToSell / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_CameroonMember | 334 aes_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 |  |  |  | 8 us-gaap_ProceedsFromDivestitureOfBusinesses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_SaurashtraMember |  |  |  |  |  |  |
Generation capacity mega watts |  |  |  |  |  |  |  |  |  | 39 aes_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 |  |  |  |  | 27 us-gaap_ProceedsFromDivestitureOfBusinesses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_USWindProjectsMember |  |  |  |  |  |
Generation capacity mega watts |  |  |  |  |  |  |  | 234 aes_GenerationCapacityMegaWatts / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_USWindProjectsMember |  |  |
Number of wind projects |  |  |  |  |  |  |  | 3 aes_NumberofWindProjects / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_USWindProjectsMember |  |  |
Deferred proceeds from divestiture of businesses |  |  |  |  | 3 aes_DeferredProceedsFromDivestitureOfBusinesses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_USWindProjectsMember |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Gross Profit (Loss) | 4 us-gaap_DisposalGroupIncludingDiscontinuedOperationGrossProfitLoss / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_USWindProjectsMember | 3 us-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 |  |  |  |  |  |  |  |  |  |  | 3 aes_NumberofEquityInterestsSold / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember
Disposal Group, Including Discontinued Operation, Consideration |  |  |  |  |  | 200 us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember | 200 us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember |  |  |  |
Letter of Credit Related to Sale Agreement | 40 aes_LetterofCreditRelatedtoSaleAgreement / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember |  |  |  |  |  |  |  |  |  |
Net proceeds received from sale of businesses |  |  |  |  |  | 156 us-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 |  |  |  |  |  |  |  | 101 aes_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 |  |  |  |  |  |  |  | 75 aes_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 |  |  |  |  |  | 44 aes_DisposalGroupIncludingDiscontinuedOperationNoncontingentConsiderationFairValueAmounttobeReceived / us-gaap_BalanceSheetLocationAxis = aes_NoncurrentAssetMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember | 44 aes_DisposalGroupIncludingDiscontinuedOperationNoncontingentConsiderationFairValueAmounttobeReceived / us-gaap_BalanceSheetLocationAxis = aes_NoncurrentAssetMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember |  |  |  |
Carrying amount | $ 44 us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount / us-gaap_BalanceSheetLocationAxis = aes_NoncurrentAssetMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_CameroonMember |  |  |  |  |  |  |  |  |  |

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- Definition Disposal Group, Including Discontinued Operation, Non-contingent Consideration, Fair Value, Amount to be Received + References No definition available. + Details
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- 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 No definition available. + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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