Consolidated Statement Of Changes In Equity (USD $) In Millions	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, 2012	$ 19,898	$ 19,668	$ 5,685	$ 1,255	$ (7,021)	$ 311
Net income (loss)	166				166
Preferred stock dividends - U.S. Department of Treasury	(267)				(267)
Preferred stock dividends	(134)				(134)
Other comprehensive income (loss)	(498)					(498)
Ending Balance at Jun. 30, 2013	19,165	19,668	5,685	1,255	(7,256)	(187)
Beginning Balance at Dec. 31, 2013	14,208	20,939	0	1,255	(7,710)	(276)
Net income (loss)	550				550
Preferred stock dividends - U.S. Department of Treasury	0
Preferred stock dividends	(133)				(133)
Employee Benefits and Share-based Compensation	72	72
Other comprehensive income (loss)	181					181
Ending Balance at Jun. 30, 2014	$ 14,878	$ 21,011	$ 0	$ 1,255	$ (7,293)	$ (95)