Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net earnings		$ 567	$ 706	$ 1,803	$ 2,248
Other comprehensive income (loss) before income taxes:
Unrealized foreign currency translation gains (losses) during period		186	(904)	25	(459)
Unrealized gains (losses) on investment securities:
Unrealized holding gains (losses) on investment securities during period		(401)	774	(2,266)	3,656
Reclassification adjustment for realized (gains) losses on investment securities included in net earnings		138	(27)	20	(18)
Unrealized gains (losses) on derivatives during period		(1)	(9)	(3)	(8)
Pension liability adjustment during period		0	3	1	2
Total other comprehensive income (loss) before income taxes		(78)	(163)	(2,223)	3,173
Income tax expense (benefit) related to items of other comprehensive income (loss)		(99)	(57)	(772)	1,110
Other comprehensive income (loss), net of income taxes	[1]	21	(106)	(1,451)	2,063
Total comprehensive income (loss)		$ 588	$ 600	$ 352	$ 4,311

[1] All amounts in the table above are net of tax.