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)	257
Preferred stock dividends - U.S. Department of Treasury	(401)				(401)
Preferred stock dividends	(200)				(200)
Other comprehensive income (loss)	(494)					(494)
Adjustments to Additional Paid in Capital, Other	1	1
Ending Balance at Sep. 30, 2013	19,061	19,669	5,685	1,255	(7,365)	(183)
Beginning Balance at Dec. 31, 2013	14,208	20,939	0	1,255	(7,710)	(276)
Net income (loss)	973
Preferred stock dividends - U.S. Department of Treasury	0
Preferred stock dividends	(200)				(200)
Employee Benefits and Share-based Compensation	83	83
Other comprehensive income (loss)	126					126
Ending Balance at Sep. 30, 2014	$ 15,190	$ 21,022	$ 0	$ 1,255	$ (6,937)	$ (150)