Statement Of Changes In Consolidated Equity (USD $) In Millions	Preferred Stock [Member]	Common Stock [Member]	Additional Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Non-Controlling Interests [Member]	Total
Beginning balance at Dec. 31, 2009	$ 55	$ 1,097	$ 6,608	$ 11,020	$ (4,268)	$ (2,092)	$ 3,100	$ 15,520
Net (loss) income				(65)			56	(9)
Other comprehensive (loss) income						(301)	13	(288)
Cash dividends declared:
Preferred				(1)				(1)
Common				(62)				(62)
Stock-based compensation			50					50
Common stock issued: compensation plans			(101)		91			(10)
Issuance of common stock		44	556					600
Distributions							(113)	(113)
Contributions							64	64
Purchase of equity from noncontrolling interest			(2)				(4)	(6)
Other			(20)					(20)
Ending balance at Jun. 30, 2010	55	1,141	7,091	10,892	(4,177)	(2,393)	3,116	15,725
Beginning balance at Mar. 31, 2010	55	1,141	7,100	10,787	(4,191)	(2,223)	3,181	15,850
Net (loss) income				136			34	170
Other comprehensive (loss) income						(170)	(94)	(264)
Cash dividends declared:
Common				(31)				(31)
Stock-based compensation			25					25
Common stock issued: compensation plans			(34)		14			(20)
Distributions							(41)	(41)
Contributions							37	37
Other							(1)	(1)
Ending balance at Jun. 30, 2010			7,091	10,892	(4,177)	(2,393)	3,116	15,725
Beginning balance at Dec. 31, 2010	55	1,141	7,087	11,149	(4,146)	(1,675)	3,475	17,086
Net (loss) income				630			113	743
Other comprehensive (loss) income						817	189	1,006
Cash dividends declared:
Preferred				(1)				(1)
Common				(64)				(64)
Stock-based compensation			45					45
Common stock issued: compensation plans			(173)		187			14
Issuance of common stock		37	563					600
Distributions							(187)	(187)
Contributions							128	128
Other							(1)	(1)
Ending balance at Jun. 30, 2011	55	1,178	7,522	11,714	(3,959)	(858)	3,717	19,369
Beginning balance at Mar. 31, 2011	55	1,178	7,508	11,424	(3,973)	(1,418)	3,630	18,404
Net (loss) income				322			55	377
Other comprehensive (loss) income						560	114	674
Cash dividends declared:
Common				(32)				(32)
Stock-based compensation			22					22
Common stock issued: compensation plans			(8)		14			6
Distributions							(90)	(90)
Contributions							7	7
Other							1	1
Ending balance at Jun. 30, 2011			$ 7,522	$ 11,714	$ (3,959)	$ (858)	$ 3,717	$ 19,369