Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $) In Millions, except Share data in Thousands	Total	Common stocks	Preferred Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Scenario, Previously Reported	Retained Earnings Scenario, Adjustment	Retained Earnings Scenario, Actual	Treasury Stock, at Cost	Accumulated Other Comprehensive Loss, Net of Tax	Noncontrolling Interest
Balance at beginning of period at Dec. 31, 2009			$ 2,960	$ 8,985		$ 11,164		$ 11,190	$ (1,936)	$ (3,312)	$ 29
Common Shares Outstanding at beginning of period (in thousands) at Dec. 31, 2009		383,007
Preferred Shares Outstanding at beginning of period (in thousands) at Dec. 31, 2009			3,400
Issuance of mandatory convertible preferred stock			556
Accelerated accretion of discount from redemption of preferred stock issued to U.S. Treasury			440		(440)
Redemption of preferred stock to the U.S. Treasury			(3,400)
Common Stock		5
Issuance of shares under public offering				1,599
Issuance of shares under incentive and stock compensation plans				(123)
Tax expense on employee stock options and awards				(6)
Cumulative effect of accounting change, net of tax							26	(194)		194
Net income (loss)	1,061				1,061
Dividends on preferred stock					(64)
Dividends declared on common stock					(65)
Issuance of shares under incentive and stock compensation plans from treasury stock									150
Return of shares under incentive and stock compensation plans and other to treasury stock									(3)
Total other comprehensive income	3,312									3,312
Recognition of noncontrolling interest in other liabilities											(29)
Increase in retained earnings due to new accounting policies, net of tax											20,909
Redemption of shares issued to the U.S. Treasury			(3,400)
Issuance of mandatory convertible preferred shares			575
Issuance of shares under public offering		59,590
Issuance of shares under incentive and stock compensation plans		1,901
Return of shares under incentive and stock compensation plans and other to treasury stock		(132)
Balance at end of period at Sep. 30, 2010			556	10,455	11,488				(1,789)	194	0
Common Shares Outstanding at end of period (in thousands) at Sep. 30, 2010		444,366
Preferred Shares Outstanding at end period (in thousands) at Sep. 30, 2010			575
Balance at beginning of period at Dec. 31, 2010	20,311		556	10,448		12,077		12,077	(1,774)	(1,001)	0
Common Shares Outstanding at beginning of period (in thousands) at Dec. 31, 2010		444,549
Preferred Shares Outstanding at beginning of period (in thousands) at Dec. 31, 2010			575
Common Stock	5	5
Issuance of shares under incentive and stock compensation plans				(43)
Tax expense on employee stock options and awards				(10)
Net income (loss)	535				535
Dividends on preferred stock					(31)
Dividends declared on common stock					(134)
Issuance of shares under incentive and stock compensation plans from treasury stock									94
Return of shares under incentive and stock compensation plans and other to treasury stock									(7)
Total other comprehensive income	2,066									2,066
Increase in retained earnings due to new accounting policies, net of tax											22,781
Issuance of shares under incentive and stock compensation plans		1,203
Return of shares under incentive and stock compensation plans and other to treasury stock		(238)
Balance at end of period at Sep. 30, 2011	22,781		556	10,395	12,447				(1,687)	1,065	0
Common Shares Outstanding at end of period (in thousands) at Sep. 30, 2011		445,514
Preferred Shares Outstanding at end period (in thousands) at Sep. 30, 2011			575
Balance at beginning of period at Jun. 30, 2011
Common Stock	5
Net income (loss)	0
Total other comprehensive income	1,142
Increase in retained earnings due to new accounting policies, net of tax											22,781
Balance at end of period at Sep. 30, 2011	$ 22,781		$ 556								$ 0
Preferred Shares Outstanding at end period (in thousands) at Sep. 30, 2011			575