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, 2011	$ 19,280	$ 19,668	$ 5,685	$ 1,255	$ (7,415)	$ 87
Net income (loss)	(204)				(204)
Preferred stock dividends - U.S. Department of Treasury	(401)				(401)
Preferred stock dividends	(200)				(200)
Other comprehensive income (loss)	199					199
Ending Balance at Sep. 30, 2012	18,674	19,668	5,685	1,255	(8,220)	286
Beginning Balance at Dec. 31, 2012	19,898	19,668	5,685	1,255	(7,021)	311
Net income (loss)	257				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)