CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) (USD $) In Millions, unless otherwise specified	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated deficit	Accumulated other comprehensive loss
Balance at beginning of period at Dec. 31, 2012		$ 1,575		$ 23,974	$ (19,187)	$ (257)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Employee benefit plans, including transfers and other				(7)
Net income	613				613
Dividends on preferred stock					(93)
Other comprehensive income	112					112
Total common shareholder's equity at end of period	5,155
Total shareholders' equity at end of period at Sep. 30, 2013	6,730	1,575	0	23,967	(18,667)	(145)
Balance at beginning of period at Dec. 31, 2013	6,661	1,575		23,968	(18,774)	(108)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Employee benefit plans, including transfers and other				19
Net income	487				487
Dividends on preferred stock					(93)
Other comprehensive income	35					35
Total common shareholder's equity at end of period	5,534
Total shareholders' equity at end of period at Sep. 30, 2014	$ 7,109	$ 1,575	$ 0	$ 23,987	$ (18,380)	$ (73)