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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			$	4,156		$	4,435		$	4,307		$	4,230
Gross margin				993			992			1,010			1,075
Income from continuing operations, net of tax ⁽²⁾				490			436			203			405
Discontinued operations, net of tax				(7)			(9)			(28)			40
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		$	(0.09)		$	0.12
Discontinued operations attributable to
	The AES Corporation, net of tax			(0.02)			(0.02)			(0.08)			(0.39)
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		$	(0.09)		$	0.12
Discontinued operations attributable to
	The AES Corporation, net of tax			(0.02)			(0.02)			(0.08)			(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			$	3,805		$	3,803		$	3,885		$	4,192
Gross margin				943			976			944			1,008
Income from continuing operations, net of tax ⁽³⁾				379			423			281			378
Discontinued operations, net of tax				23			6			116			(547)
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		$	0.04		$	0.15
Discontinued operations attributable to
	The AES Corporation, net of tax			0.02			(0.01)			0.10			(0.70)
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		$	0.04		$	0.15
Discontinued operations attributable to
	The AES Corporation, net of tax			0.02			(0.01)			0.10			(0.70)
Diluted income (loss) per share attributable to
	The AES Corporation		$	0.27		$	0.18		$	0.14		$	(0.55)