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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