Consolidated Statement of Changes in Shareholders' Equity (Unaudited) (USD $) In Millions, unless otherwise specified	Total	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive loss	Preferred Stock
Balance at beginning and end of period at Dec. 31, 2010					$ 1,575
Balance at beginning of period at Dec. 31, 2010		23,321	(16,685)	(491)
Net loss	(21)		(21)
Dividends:
Preferred stock			(34)
Other comprehensive income	59			59
Balance at end of period at Mar. 31, 2011	6,149	23,321	(16,740)	(432)
Balance at beginning and end of period at Dec. 31, 2011	6,926				1,575
Balance at beginning of period at Dec. 31, 2011	5,351	23,966	(18,219)	(396)
Employee benefit plans, including transfers and other		8
Net loss	(155)		(155)
Dividends:
Preferred stock			(32)
Other comprehensive income	51			51
Balance at end of period at Mar. 31, 2012	$ 5,223	$ 23,974	$ (18,406)	$ (345)