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Financial Statement Presentation (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2012
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Consolidation Disclosure [Abstract] |
Proceeds From Sale Of New York Plants | $ 240

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- Details
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Data Type: | xbrli:stringItemType
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- Definition Represents proceeds received from the sale of Cayuga and Somerset, two New York plants in the Eastern Energy LP portfolio. + References No definition available. + Details
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Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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