Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 663		$ 732
Other comprehensive income (loss) before income taxes:
Unrealized foreign currency translation gains (losses) during period	9		(57)
Unrealized gains (losses) on investment securities:
Unrealized holding gains (losses) on investment securities during period	593		1,399
Reclassification adjustment for realized (gains) losses on investment securities included in net earnings	(50)		(2)
Unrealized gains (losses) on derivatives during period	(4)		(1)
Pension liability adjustment during period	0		(1)
Total other comprehensive income (loss) before income taxes	548		1,338
Income tax expense (benefit) related to items of other comprehensive income (loss)	195		468
Other comprehensive income (loss), net of income taxes	353	[1]	870	[1]
Total comprehensive income (loss)	$ 1,016		$ 1,602

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