Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net earnings		$ 2,533	$ 2,951	$ 3,158
Other comprehensive income (loss) before income taxes:
Unrealized foreign currency translation gains (losses) during period		360	(1,455)	(1,588)
Unrealized gains (losses) on investment securities:
Unrealized holding gains (losses) on investment securities during period		(2,534)	5,947	(2,362)
Reclassification adjustment for realized (gains) losses on investment securities included in net earnings		(61)	(54)	(56)
Unrealized gains (losses) on derivatives during period		0	(17)	(10)
Pension liability adjustment during period		(20)	(76)	157
Total other comprehensive income (loss) before income taxes		(2,255)	4,345	(3,859)
Income tax expense (benefit) related to items of other comprehensive income (loss)		(901)	1,803	(581)
Other comprehensive income (loss), net of income taxes	[1]	(1,354)	2,542	(3,278)
Total comprehensive income (loss)		$ 1,179	$ 5,493	$ (120)

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