Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Statement of Other Comprehensive Income [Abstract]
Net earnings	$ 483	$ 274	$ 1,268	$ 663
Other comprehensive income (loss) before income taxes:
Unrealized foreign currency translation gains (losses) during period	32	(93)	(68)	(89)
Unrealized gains (losses) on investment securities:
Unrealized holding gains (losses) on investment securities during period	(319)	473	5	(136)
Reclassification adjustment for realized (gains) losses on investment securities included in net earnings	(368)	(716)	(497)	(1,243)
Unrealized gains (losses) on derivatives during period	4	17	(8)	(38)
Pension liability adjustment during period	(2)	0	3	4
Total other comprehensive income (loss) before income taxes	83	1,113	429	984
Income tax expense (benefit) related to items of other comprehensive income (loss)	(89)	293	222	300
Other comprehensive income (loss), net of income taxes	172	820	207	684
Total comprehensive income (loss)	$ 655	$ 1,094	$ 1,475	$ 1,347