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Fair Value (Quantitative Information) (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2012
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Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |
Fair Value | $ 14 | $ (4) | $ (4) | $ (341)
Interest rate derivatives [Member] |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |
Fair Value | (87) | (101) | (72) | (412)
Interest rate derivatives [Member] | Minimum [Member] |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |
Subsidiaries' credit risk | 3.72% |  |  |
Interest rate derivatives [Member] | Maximum [Member] |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |
Subsidiaries' credit risk | 4.48% |  |  |
Interest rate derivatives [Member] | Weighted Average [Member] |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |
Subsidiaries' credit risk | 3.90% |  |  |
Foreign Currency Embedded Derivative Argentine Peso [Member] |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |
Fair Value | 105 |  |  |
Foreign Currency Embedded Derivative Argentine Peso [Member] | Minimum [Member] |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |
Argentine Peso to U.S. Dollar currency exchange rate after 1 year | 8.13 |  |  |
Foreign Currency Embedded Derivative Argentine Peso [Member] | Maximum [Member] |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |
Argentine Peso to U.S. Dollar currency exchange rate after 1 year | 30.46 |  |  |
Foreign Currency Embedded Derivative Argentine Peso [Member] | Weighted Average [Member] |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |
Argentine Peso to U.S. Dollar currency exchange rate after 1 year | 19.96 |  |  |
Foreign Currency Embedded Derivative Euro [Member] |  |  |  |
Fair Value Derivative Assets Liabilities Measured On Recurring Basis Unobservable Inputs [Abstract] |  |  |  |
Fair Value | $ (4) |  |  |
Subsidiaries' credit risk | 3.72% |  |  |

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- Definition The credit rating used by the parent company or subsidiary to determine the fair value of derivative instruments at the balance sheet date. + References No definition available. + Details
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Namespace Prefix: | aes_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents net derivative assets and liabilities measured at fair value using significant unobservable inputs (Level 3) which are required for reconciliation purposes of beginning and ending balances. + References No definition available. + Details
Name: | aes_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetsLiabilitiesValue
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The U.S. Dollar indexation in Argentina used to determine the fair value of derivative instruments at the balance sheet date. + References No definition available. + Details
Name: | aes_USDollarIndexationInArgentina
Namespace Prefix: | aes_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant