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Selected Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2011

Selected Quarterly Financial Data Tables [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

			Quarter Ended 2011
			Mar 31			June 30			Sept 30			Dec 31⁽¹⁾

			(in millions, except per share data)
Revenue			$	4,189		$	4,471		$	4,345		$	4,269
Gross margin				1,005			1,005			1,029			1,095
Income from continuing operations, net of tax ⁽²⁾				489			435			208			409
Discontinued operations, net of tax				(6)			(8)			(33)			36
Net income			$	483		$	427		$	175		$	445
Net income (loss) attributable to The AES Corporation			$	224		$	174		$	(131)		$	(209)

Basic income (loss) per share:
Income from continuing operations attributable to
	The AES Corporation, net of tax		$	0.30		$	0.24		$	(0.08)		$	0.13
Discontinued operations attributable to
	The AES Corporation, net of tax			(0.02)			(0.02)			(0.09)			(0.40)
Basic income (loss) per share attributable to
	The AES Corporation		$	0.28		$	0.22		$	(0.17)		$	(0.27)

Diluted income (loss) per share:
Income from continuing operations attributable to
	The AES Corporation, net of tax		$	0.30		$	0.24		$	(0.08)		$	0.12
Discontinued operations attributable to
	The AES Corporation, net of tax			(0.02)			(0.02)			(0.09)			(0.39)
Diluted income (loss) per share attributable to
	The AES Corporation		$	0.28		$	0.22		$	(0.17)		$	(0.27)

			Quarter Ended 2010
			Mar 31			June 30			Sept 30			Dec 31

			(in millions, except per share data)
Revenue			$	3,836		$	3,838		$	3,924		$	4,230
Gross margin				954			989			963			1,030
Income from continuing operations, net of tax ⁽³⁾				378			422			285			385
Discontinued operations, net of tax				24			7			112			(554)
Net income			$	402		$	429		$	397		$	(169)
Net income (loss) attributable to The AES Corporation			$	187		$	144		$	114		$	(436)

Basic income (loss) per share:
Income from continuing operations attributable to
	The AES Corporation, net of tax		$	0.25		$	0.19		$	0.05		$	0.16
Discontinued operations attributable to
	The AES Corporation, net of tax			0.02			(0.01)			0.09			(0.71)
Basic income (loss) per share attributable to
	The AES Corporation		$	0.27		$	0.18		$	0.14		$	(0.55)

Diluted income (loss) per share:
Income from continuing operations attributable to
	The AES Corporation, net of tax		$	0.25		$	0.19		$	0.05		$	0.16
Discontinued operations attributable to
	The AES Corporation, net of tax			0.02			(0.01)			0.09			(0.71)
Diluted income (loss) per share attributable to
	The AES Corporation		$	0.27		$	0.18		$	0.14		$	(0.55)