Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Statement of Income and Comprehensive Income [Abstract]
Net earnings	$ 785	$ 389
Other comprehensive income (loss) before income taxes:
Unrealized foreign currency translation gains (losses) during period	(100)	4
Unrealized gains (losses) on investment securities:
Unrealized holding gains (losses) on investment securities during period	324	(609)
Reclassification adjustment for realized (gains) losses on investment securities included in net earnings	129	527
Unrealized gains (losses) on derivatives during period	(12)	(55)
Pension liability adjustment during period	5	4
Total other comprehensive income (loss) before income taxes	346	(129)
Income tax expense (benefit) related to items of other comprehensive income (loss)	311	9
Other comprehensive income (loss), net of income taxes	35	(138)
Total comprehensive income (loss)	$ 820	$ 251