Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Consolidated Statement of Comprehensive Income [Abstract]
Net income	$ 464	$ 427
Other comprehensive income (loss), net of related taxes:
Foreign currency translation, net of related taxes of ($64) and $49, respectively	(248)	146
Change in net unrealized losses on available-for-sale securities, net of reclassification adjustment and net of related taxes of $29 and $103, respectively	51	176
Change in net unrealized gains on available-for-sale securities designated in fair value hedges, net of related taxes of $9 and $21, respectively	15	32
Other-than-temporary impairment on held-to-maturity securities related to factors other than credit, net of related taxes of $4 and $1, respectively	6	3
Change in net unrealized losses on cash flow hedges, net of related taxes of $41 and $1, respectively	64	1
Change in unrealized losses on retirement plans, net of related taxes of $2 and $1, respectively	3	2
Other comprehensive income (loss)	(109)	360
Total comprehensive income	$ 355	$ 787