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Other Income and Expense (Nonoperating Income) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 3 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Gain on sale of assets | $ 68 aes_GainOnSaleOfAssets | $ 12 aes_GainOnSaleOfAssets | $ 21 aes_GainOnSaleOfAssets |
Contingency reversal | 18 aes_ReversalOfLegalContingency | 10 aes_ReversalOfLegalContingency | 0 aes_ReversalOfLegalContingency |
Contract termination - Beaver Valley | 0 aes_OtherIncomeContractTermination | 60 aes_OtherIncomeContractTermination | 0 aes_OtherIncomeContractTermination |
Insurance proceeds | 0 aes_InsuranceProceeds | 0 aes_InsuranceProceeds | 38 aes_InsuranceProceeds |
Gain on extinguishment of tax and other liabilities | 0 aes_GainLossonExtinguishmentofTaxandOtherLiabilities | 9 aes_GainLossonExtinguishmentofTaxandOtherLiabilities | 0 aes_GainLossonExtinguishmentofTaxandOtherLiabilities |
Other | 38 us-gaap_OtherOperatingIncome | 34 us-gaap_OtherOperatingIncome | 39 us-gaap_OtherOperatingIncome |
Total other income | 124 us-gaap_OtherIncome | 125 us-gaap_OtherIncome | 98 us-gaap_OtherIncome |
AES Cartagena |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Gain on sale of assets | 54 aes_GainOnSaleOfAssets / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_AesCartagenaMember |  |  |
ARGENTINA |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Interest Income, Other |  |  |  | 59 us-gaap_InterestIncomeOther / us-gaap_StatementGeographicalAxis = country_AR
Embedded Derivative, Gain on Embedded Derivative |  |  |  | $ 106 us-gaap_EmbeddedDerivativeGainOnEmbeddedDerivative / us-gaap_StatementGeographicalAxis = country_AR

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- Definition Gain (Loss) on Extinguishment of Tax and Other Liabilities + References No definition available. + Details
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- Definition Amount of gain on sale or disposal of assets. + References No definition available. + Details
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- Definition Insurance Proceeds + References No definition available. + Details
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- Definition Other Income related to the termination of a contract associated with exit from or disposal of business activities or restructurings pursuant to a plan. + References No definition available. + Details
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- Definition Increase in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition Amount of interest income earned from interest bearing assets not separately disclosed. + References No definition available. + Details
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- Definition Reflects the sum of all other revenue and income recognized by the entity in the period not otherwise specified in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.4) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 4 -Article 7 + Details
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