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Debt Interest Expense (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Jun. 30, 2014 | Jun. 30, 2013
Debt Disclosure [Abstract] |  |
Increase (Decrease) in Interest Expense, Debt | $ (48) | $ (34)

X
- Definition Increase (Decrease) in Interest Expense, Debt + References No definition available. + Details
Name: | aes_IncreaseDecreaseinInterestExpenseDebt
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration