Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $) Share data in Thousands	Total	Common Stocks	Preferred Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock, at Cost	Accumulated Other Comprehensive Loss, net of tax	Scenario, Previously Reported	Scenario, Actual Retained Earnings	Scenario, Actual Accumulated Other Comprehensive Loss, net of tax
Balance at beginning of period at Dec. 31, 2010	$ 18,700,000,000		$ 556,000,000	$ 10,448,000,000		$ (1,774,000,000)		$ 20,300,000,000
Common Shares Outstanding at beginning of period (in thousands) at Dec. 31, 2010		444,549
Common Stock		5,000,000
Issuance of shares under incentive and stock compensation plans				(47,000,000)
Tax expense on employee stock options and awards				(10,000,000)
Net income	501,000,000				501,000,000			511,000,000
Dividends on preferred stock					(10,000,000)
Dividends declared on common stock					(45,000,000)
Issuance of shares under incentive and stock compensation plans from treasury stock						57,000,000
Return of shares under incentive and stock compensation plans and other to treasury stock						(5,000,000)
Total other comprehensive income	252,000,000						252,000,000
Issuance of shares under incentive and stock compensation plans		727
Return of shares under incentive and stock compensation plans and other to treasury stock		(168)
Balance at end of period at Mar. 31, 2011	19,447,000,000			10,391,000,000	10,955,000,000	(1,722,000,000)	(738,000,000)		10,509,000,000	(990,000,000)
Common Shares Outstanding at end of period (in thousands) at Mar. 31, 2011		445,108
Balance at beginning of period at Dec. 31, 2011	21,486,000,000		556,000,000	10,391,000,000		(1,718,000,000)		22,910,000,000
Common Shares Outstanding at beginning of period (in thousands) at Dec. 31, 2011		442,539
Repurchase of warrants	300,000,000			(300,000,000)
Common Stock	5,000,000	5,000,000
Issuance of shares under incentive and stock compensation plans				(58,000,000)
Tax expense on employee stock options and awards				(2,000,000)
Net income	96,000,000				96,000,000
Dividends on preferred stock					(10,000,000)
Dividends declared on common stock					(45,000,000)
Treasury stock acquired	42,000,000	(2,550,000)				(42,000,000)
Issuance of shares under incentive and stock compensation plans from treasury stock						79,000,000
Return of shares under incentive and stock compensation plans and other to treasury stock						(7,000,000)
Total other comprehensive income	77,000,000						77,000,000
Issuance of shares under incentive and stock compensation plans		1,202
Return of shares under incentive and stock compensation plans and other to treasury stock		(326)
Balance at end of period at Mar. 31, 2012	$ 21,274,000,000			$ 10,031,000,000	$ 11,042,000,000	$ (1,688,000,000)	$ 1,328,000,000		$ 11,001,000,000	$ 1,251,000,000
Common Shares Outstanding at end of period (in thousands) at Mar. 31, 2012		440,865