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, 2011	$ 19,280		$ 19,668	$ 5,685	$ 1,255	$ (7,415)		$ 87
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,196					1,196
Preferred stock dividends - U.S. Department of Treasury	(535)					(535)
Preferred stock dividends	(267)					(267)
Other comprehensive income (loss)	224							224
Ending Balance at Dec. 31, 2012	19,898		19,668	5,685	1,255	(7,021)		311
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	361					361
Preferred stock dividends - U.S. Department of Treasury	(543)	[1]		(8)		(543)	[1]
Preferred stock dividends	(267)					(267)
Other comprehensive income (loss)	(587)							(587)
Adjustments to Additional Paid in Capital, Other	1		1
Stock Issued During Period, Value, New Issues	1,270		1,270
Stock Repurchased During Period, Value	(5,925)			(5,685)		(240)
Ending Balance at Dec. 31, 2013	14,208		20,939	0	1,255	(7,710)		(276)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,150					1,150
Preferred stock dividends - U.S. Department of Treasury	0
Preferred stock dividends	(268)					(268)
Employee Benefits and Share-based Compensation	99		99
Other comprehensive income (loss)	210							210
Ending Balance at Dec. 31, 2014	$ 15,399		$ 21,038	$ 0	$ 1,255	$ (6,828)		$ (66)

[1] Includes $8 million of preferred stock dividends paid to the U.S. Department of Treasury related to the period from November 15, 2013 through November 20, 2013.