Consolidated Statement Of Changes In Shareholders' Equity (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Preferred Stock [Member]	Common Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2008	$ 1,883	$ 432	$ 6,992	$ 9,135	$ (5,650)	$ (18)	$ 12,774
Balance, Shares at Dec. 31, 2008		431,976				418
Comprehensive income:
Net income (loss)				(1,881)			(1,881)
Change in net unrealized loss on available-for-sale securities, net of reclassification adjustment and net of related taxes					3,410		3,410
Change in net unrealized loss on available-for-sale securities designated in fair value hedges, net of related taxes					129		129
Expected losses from other-than-temporary impairment on held-to-maturity securities related to factors other than credit, net of related taxes					(387)		(387)
Foreign currency translation, net of related taxes					213		213
Change in net unrealized loss on cash flow hedges, net of related taxes					10		10
Change in minimum pension liability, net of related taxes					37		37
Total comprehensive income				(1,881)	3,412		1,531
Stock issued		59	2,172				2,231
Cash dividends declared:
Common stock				(20)			(20)
Preferred stock				(46)			(46)
Accretion of preferred stock discount	11			(11)			117
Prepayment of preferred stock discount	106			(106)
Stock issued, Shares		58,974
Redemption of TARP preferred stock	(2,000)						(2,000)
Repurchase of TARP common stock warrant			(60)				(60)
Common stock awards and options exercised, including related taxes, Shares		4,416
Common stock awards and options exercised, including related taxes		4	76				80
Other, Shares						14
Other						1	1
Balance at Dec. 31, 2009		495	9,180	7,071	(2,238)	(17)	14,491
Adjustment for effect of application of provisions of new accounting standard at Dec. 31, 2009				27	(27)
Balance, Shares at Dec. 31, 2009		495,366				432
Balance at Dec. 31, 2009		495	9,180	7,098	(2,265)	(17)	14,491
Balance, Shares at Dec. 31, 2009						432
Comprehensive income:
Net income (loss)				1,556			1,556
Change in net unrealized loss on available-for-sale securities, net of reclassification adjustment and net of related taxes					1,398		1,398
Change in net unrealized loss on available-for-sale securities designated in fair value hedges, net of related taxes					(22)		(22)
Expected losses from other-than-temporary impairment on held-to-maturity securities related to factors other than credit, net of related taxes					276		276
Foreign currency translation, net of related taxes					(65)		(65)
Change in net unrealized loss on cash flow hedges, net of related taxes					7		7
Change in minimum pension liability, net of related taxes					(18)		(18)
Total comprehensive income				1,556	1,576		3,132
Cash dividends declared:
Common stock				(20)			(20)
Common stock awards and options exercised, including related taxes, Shares		6,698					297
Common stock awards and options exercised, including related taxes		7	176				183
Other, Shares						(12)
Other						1	1
Balance at Dec. 31, 2010		502	9,356	8,634	(689)	(16)	17,787
Balance, Shares at Dec. 31, 2010		502,064				420
Comprehensive income:
Net income (loss)				1,920			1,920
Change in net unrealized loss on available-for-sale securities, net of reclassification adjustment and net of related taxes					328		328
Change in net unrealized loss on available-for-sale securities designated in fair value hedges, net of related taxes					(75)		(75)
Expected losses from other-than-temporary impairment on held-to-maturity securities related to factors other than credit, net of related taxes					25		25
Foreign currency translation, net of related taxes					(216)		(216)
Change in net unrealized loss on cash flow hedges, net of related taxes					6		6
Change in minimum pension liability, net of related taxes					(38)		(38)
Total comprehensive income				1,920	30		1,950
Stock issued	500						500
Cash dividends declared:
Common stock				(358)			(358)
Preferred stock				(20)			(20)
Common stock acquired						(675)	(675)
Common stock acquired,shares						16,313
Common stock awards and options exercised, including related taxes, Shares		1,902				(177)	1,028
Common stock awards and options exercised, including related taxes		2	223			10	235
Other, Shares						(14)
Other			(22)			1	(21)
Balance at Dec. 31, 2011	$ 500	$ 504	$ 9,557	$ 10,176	$ (659)	$ (680)	$ 19,398
Balance, Shares at Dec. 31, 2011		503,966				16,542