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Subsequent Events (Details) (USD $) In Millions, unless otherwise specified | 0 Months Ended
--- | ---
Feb. 10, 2012 Red Oak Sale Agreement [Member] mw | Feb. 23, 2012 Ironwood Sale Agreement [Member] mw
Subsequent Event [Line Items] |  |
Generation Capacity Mega Watts | 832 | 710
Ownership Interest Sold | 100.00% | 100.00%
Disposed Business Sales Price | $ 147 | $ 87

X
- Definition Represents the amount to be received for the sale of the business, subject to customary purchase price adjustments. + References No definition available. + Details
Name: | aes_DisposedBusinessSalesPrice
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total generation capacity of the subsidiary, in megawatts. + References No definition available. + Details
Name: | aes_GenerationCapacityMegaWatts
Namespace Prefix: | aes_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the Company's ownership interest sold. + References No definition available. + Details
Name: | aes_OwnershipInterestSold
Namespace Prefix: | aes_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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