Earnings Per Common Share (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Earnings (loss) per common share
Net income (loss)	$ 6,232	[1]	$ (7,299)	[1]	$ (545)	[1]	$ (994)	[1]
Preferred stock dividends	(343)		(348)		(954)		(1,036)
Net income (loss) applicable to common shareholders	5,889		(7,647)		(1,499)		(2,030)
Dividends and undistributed earnings allocated to participating securities	(30)		(1)		(1)		(3)
Net income (loss) allocated to common shareholders	$ 5,859		$ (7,648)		$ (1,500)		$ (2,033)
Average common shares issued and outstanding (in thousands)	10,116,284		9,976,351		10,095,859		9,706,951
Earnings (loss) per common share	$ 0.58		$ (0.77)		$ (0.15)		$ (0.21)

[1] There were no material intersegment revenues.