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Derivative Instruments and Hedging Activities (Outstanding Derivative Notionals and Terms by Type) (Details) In Millions, unless otherwise specified |  | 12 Months Ended |
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Dec. 31, 2014 USD ($) | Dec. 31, 2014 Libor USD Interest Rate Contract USD ($) | Dec. 31, 2014 Euribor EUR Interest Rate Contract USD ($) | Dec. 31, 2014 Euribor EUR Interest Rate Contract EUR (€) | Dec. 31, 2014 Chilean Unidad De Fomento CLF Cross Currency Interest Rate Contract USD ($) | Dec. 31, 2014 Chilean Unidad De Fomento CLF Cross Currency Interest Rate Contract CLF | Dec. 31, 2014 Current Notional Libor USD Interest Rate Contract USD ($) | Dec. 31, 2014 Current Notional Euribor EUR Interest Rate Contract USD ($) | Dec. 31, 2014 Current Notional Euribor EUR Interest Rate Contract EUR (€) | Dec. 31, 2014 Current Notional Chilean Unidad De Fomento CLF Cross Currency Interest Rate Contract USD ($) | Dec. 31, 2014 Current Notional Chilean Unidad De Fomento CLF Cross Currency Interest Rate Contract CLF
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount | $ 3,000 invest_DerivativeNotionalAmount | $ 3,047 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_InterestRateContractMember / aes_DerivativeByTypeAxis = aes_LiborUsdMember | $ 642 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_InterestRateContractMember / aes_DerivativeByTypeAxis = aes_EuriborEurMember | € 531 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_InterestRateContractMember / aes_DerivativeByTypeAxis = aes_EuriborEurMember | $ 179 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_CrossCurrencyInterestRateContractMember / aes_DerivativeByTypeAxis = aes_ChileanUnidadDeFomentoClfMember | 4 invest_DerivativeNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_CrossCurrencyInterestRateContractMember / aes_DerivativeByTypeAxis = aes_ChileanUnidadDeFomentoClfMember | $ 2,382 invest_DerivativeNotionalAmount / aes_DerivativeByCurrentMaximumAxis = aes_CurrentNotionalMember / us-gaap_DerivativeByNatureAxis = us-gaap_InterestRateContractMember / aes_DerivativeByTypeAxis = aes_LiborUsdMember | $ 642 invest_DerivativeNotionalAmount / aes_DerivativeByCurrentMaximumAxis = aes_CurrentNotionalMember / us-gaap_DerivativeByNatureAxis = us-gaap_InterestRateContractMember / aes_DerivativeByTypeAxis = aes_EuriborEurMember | € 531 invest_DerivativeNotionalAmount / aes_DerivativeByCurrentMaximumAxis = aes_CurrentNotionalMember / us-gaap_DerivativeByNatureAxis = us-gaap_InterestRateContractMember / aes_DerivativeByTypeAxis = aes_EuriborEurMember | $ 179 invest_DerivativeNotionalAmount / aes_DerivativeByCurrentMaximumAxis = aes_CurrentNotionalMember / us-gaap_DerivativeByNatureAxis = us-gaap_CrossCurrencyInterestRateContractMember / aes_DerivativeByTypeAxis = aes_ChileanUnidadDeFomentoClfMember | 4 invest_DerivativeNotionalAmount / aes_DerivativeByCurrentMaximumAxis = aes_CurrentNotionalMember / us-gaap_DerivativeByNatureAxis = us-gaap_CrossCurrencyInterestRateContractMember / aes_DerivativeByTypeAxis = aes_ChileanUnidadDeFomentoClfMember
Weighted-Average Remaining Term |  | 11 years | 7 years | 7 years | 14 years | 14 years |  |  |  |  |
% of Debt Currently Hedged by Index |  | 53.00%us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives / us-gaap_DerivativeByNatureAxis = us-gaap_InterestRateContractMember / aes_DerivativeByTypeAxis = aes_LiborUsdMember | 83.00%us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives / us-gaap_DerivativeByNatureAxis = us-gaap_InterestRateContractMember / aes_DerivativeByTypeAxis = aes_EuriborEurMember | 83.00%us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives / us-gaap_DerivativeByNatureAxis = us-gaap_InterestRateContractMember / aes_DerivativeByTypeAxis = aes_EuriborEurMember | 82.00%us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives / us-gaap_DerivativeByNatureAxis = us-gaap_CrossCurrencyInterestRateContractMember / aes_DerivativeByTypeAxis = aes_ChileanUnidadDeFomentoClfMember | 82.00%us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives / us-gaap_DerivativeByNatureAxis = us-gaap_CrossCurrencyInterestRateContractMember / aes_DerivativeByTypeAxis = aes_ChileanUnidadDeFomentoClfMember |  |  |  |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Details
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- Definition Percentage of an entity's outstanding debt that is designated as a hedged item in cash flow, fair value, or net investment hedge. + References No definition available. + Details
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