Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 622	$ 579	$ 985	$ 1,043
Other comprehensive income (loss), net of related taxes:
Foreign currency translation, net of related taxes of $37 and ($93), respectively	46	(55)	73	(303)
Net unrealized gains (losses) on available-for-sale securities, net of reclassification adjustment and net of related taxes of $355 and ($478), respectively	306	(804)	565	(753)
Net unrealized gains (losses) on available-for-sale securities designated in fair value hedges, net of related taxes of ($15) and $40, respectively	(13)	45	(23)	60
Other-than-temporary impairment on held-to-maturity securities related to factors other than credit, net of related taxes of $8 and $7, respectively	4	5	12	11
Net unrealized gains (losses) on cash flow hedges, net of related taxes of ($3) and $59, respectively	(54)	30	(61)	94
Net unrealized gains (losses) on retirement plans, net of related taxes of ($5) and $6, respectively	12	5	18	8
Other comprehensive income (loss)	301	(774)	584	(883)
Total comprehensive income	$ 923	$ (195)	$ 1,569	$ 160