Condensed Consolidated Statements of Changes in Shareholders' Equity (USD $) In Millions, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2008	$ 20,780	$ 12	$ 38	$ 20,782	$ (52)
Balance (in shares) at Dec. 31, 2008		1,201
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	3,822			3,822
Net unrealized holding gains on investment securities during the period, net of tax expense	314				314
Reclassification adjustment for net realized gains included in net earnings, net of tax expense	(7)				(7)
Foreign currency translation gain (loss)	(2)				(2)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	4,127
Issuances of common stock, and related tax benefits (in shares)		20
Issuances of common stock, and related tax benefits	221	0	221
Common stock repurchases (in shares)		(74)
Common stock repurchases	(1,801)	(1)	(574)	(1,226)
Share-based compensation, and related tax benefits	315		315
Common stock dividends	(36)			(36)
Balance at Dec. 31, 2009	23,606	11	0	23,342	253
Balance (in shares) at Dec. 31, 2009		1,147
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	4,634			4,634
Net unrealized holding gains on investment securities during the period, net of tax expense	48				48
Reclassification adjustment for net realized gains included in net earnings, net of tax expense	(45)				(45)
Foreign currency translation gain (loss)	(4)				(4)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	4,633
Issuances of common stock, and related tax benefits (in shares)		15
Issuances of common stock, and related tax benefits	207	0	207
Common stock repurchases (in shares)		(76)
Common stock repurchases	(2,517)	0	(552)	(1,965)
Share-based compensation, and related tax benefits	345		345
Common stock dividends	(449)			(449)
Balance at Dec. 31, 2010	25,825	11	0	25,562	252
Balance (in shares) at Dec. 31, 2010	1,086	1,086
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	5,142			5,142
Net unrealized holding gains on investment securities during the period, net of tax expense	268				268
Reclassification adjustment for net realized gains included in net earnings, net of tax expense	(72)				(72)
Foreign currency translation gain (loss)	13				13
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	5,351
Issuances of common stock, and related tax benefits (in shares)		18
Issuances of common stock, and related tax benefits	308	0	308
Common stock repurchases (in shares)	(65)	(65)
Common stock repurchases	(2,994)	(1)	(761)	(2,232)
Share-based compensation, and related tax benefits	453		453
Common stock dividends	(651)			(651)
Balance at Dec. 31, 2011	$ 28,292	$ 10	$ 0	$ 27,821	$ 461
Balance (in shares) at Dec. 31, 2011	1,039	1,039