Consolidated Statement of Comprehensive Income (Unaudited) - 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 income	$ 585	$ 560	$ 1,416	$ 1,545
Other comprehensive income (loss), net of related taxes:
Foreign currency translation, net of related taxes of $39 and $29, respectively	(145)	(591)	(555)	(518)
Net unrealized gains (losses) on available-for-sale securities, net of reclassification adjustment and net of related taxes	37	(140)	(106)	425
Net unrealized gains (losses) on available-for-sale securities designated in fair value hedges, net of related taxes	(16)	14	(9)	(9)
Other-than-temporary impairment on held-to-maturity securities related to factors other than credit, net of related taxes	4	4	11	16
Net unrealized gains (losses) on cash flow hedges, net of related taxes	26	117	46	56
Net unrealized gains (losses) on retirement plans, net of related taxes	4	0	19	18
Other comprehensive income (loss)	(90)	(596)	(594)	(12)
Total comprehensive income	$ 495	$ (36)	$ 822	$ 1,533