Condensed Consolidated Statement Of Changes In Equity (USD $) In Millions, unless otherwise specified		Total	Common stock and paid-in capital [Member]	Mandatorily convertible preferred stock held by U.S. Department Of Treasury [Member]	Preferred stock [Member]	Retained earnings (accumulated deficit) [Member]	Accumulated Other Comprehensive Income [Member]
Beginning Balance at Dec. 31, 2010		$ 20,489	$ 19,668	$ 5,685	$ 1,287	$ (6,410)	$ 259
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		146				146
Preferred stock dividends paid to the U.S. Department of Treasury		(134)				(134)
Preferred stock dividends		(69)				(69)
Series A preferred stock amendment	[1]	0			(32)	32
Other comprehensive income (loss)		(25)					(25)
Ending Balance at Mar. 31, 2011		20,407	19,668	5,685	1,255	(6,435)	234
Beginning Balance at Dec. 31, 2011		19,371	19,668	5,685	1,255	(7,324)	87
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		310				310
Preferred stock dividends paid to the U.S. Department of Treasury		(134)				(134)
Preferred stock dividends		(67)				(67)
Other comprehensive income (loss)		187					187
Ending Balance at Mar. 31, 2012		$ 19,667	$ 19,668	$ 5,685	$ 1,255	$ (7,215)	$ 274

[1] Refer to Note 20 to the Consolidated Financial Statements in our 2011 Annual Report on Form 10-K for further detail.