Consolidated Statements of Changes in Shareholders Equity (Unaudited) (USD $) In Millions, except Share data	Total	Common Shares	Common Stock Warrant	Capital Surplus	Retained Earnings	Treasury Stock, at Cost	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	Comprehensive Income (Loss)	Preferred Stock	Series A Preferred Stock Retained Earnings	Series B Preferred Stock	Series B Preferred Stock Retained Earnings
Beginning Balance at Dec. 31, 2009		$ 946	$ 87	$ 3,734	$ 5,158	$ (1,980)	$ (3)	$ 270		$ 2,721
Beginning Balance, Shares at Dec. 31, 2009		878,535,000
Beginning Balance, Shares at Dec. 31, 2009										2,930,000
Cumulative effect adjustment to beginning balance of Retained Earnings					45				45
Net income (loss)	35				15			20	35
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent [Abstract]
Net unrealized gains (losses) on securities available for sale, net of income taxes of $136							230		230
Net unrealized gains (losses) on derivative financial instruments, net of income taxes of ($39)							(66)		(66)
Net distribution to noncontrolling interests								(38)	(38)
Foreign currency translation adjustments							(19)		(19)
Net pension and postretirement benefit costs, net of income taxes							11		11
Total comprehensive income (loss)									198
Deferred Compensation				9
Cash dividends declared on common shares ($.02 per share) ($.04 per share)					(18)
Cash dividends declared on Preferred Stock											(12)		(62)
Amortization of discount on Series B Preferred Stock												8	(8)
Common shares reissued for stock options and other employee benefit plans				(42)		66
Common shares reissued for stock options and other employee benefit plans, Shares		1,980,000
Ending Balance at Jun. 30, 2010	11,072	946	87	3,701	5,118	(1,914)	153	252		2,729
Ending Balance, Shares at Jun. 30, 2010		880,515,000
Ending Balance, Shares at Jun. 30, 2010										2,930,000
Beginning Balance at Dec. 31, 2010	11,374	946	87	3,711	5,557	(1,904)	(17)	257		2,737
Beginning Balance, Shares at Dec. 31, 2010		880,608,000
Beginning Balance, Shares at Dec. 31, 2010										2,930,000
Net income (loss)	514				503				503
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent [Abstract]
Net unrealized gains (losses) on securities available for sale, net of income taxes of $136							103		103
Net unrealized gains (losses) on derivative financial instruments, net of income taxes of ($39)							7		7
Net distribution to noncontrolling interests								(239)	(239)
Foreign currency translation adjustments							13		13
Net pension and postretirement benefit costs, net of income taxes							3		3
Total comprehensive income (loss)									390
Deferred Compensation				(2)
Cash dividends declared on common shares ($.02 per share) ($.04 per share)					(38)
Cash dividends declared on Preferred Stock											(12)		(31)
Preferred Stock- TARP redemption, shares												(25,000,000)
Preferred Stock- TARP redemption, value												(2,451)	(49)
Repurchase of common stock warrant			(87)	17
Amortization of discount on Series B Preferred Stock					(4)							4
Common Shares issuance	70,621,000	71,000,000		533,000,000
Common shares reissued for stock options and other employee benefit plans				(68)		89
Common shares reissued for stock options and other employee benefit plans, Shares	2,593,000
Other										1
Ending Balance at Jun. 30, 2011	$ 9,737	$ 1,017	$ 0	$ 4,191	$ 5,926	$ (1,815)	$ 109	$ 18		$ 291
Ending Balance, Shares at Jun. 30, 2011		953,822,000
Ending Balance, Shares at Jun. 30, 2011										2,905,000