Consolidated Statement of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$ 540	$ 674	$ 1,583	$ 1,591
Other comprehensive income (loss), net of related taxes:
Foreign currency translation, net of related taxes	326	172	23	19
Change in net unrealized losses on available-for-sale securities, net of reclassification adjustment and net of related taxes	111	543	(642)	794
Change in net unrealized losses on available-for-sale securities designated in fair value hedges, net of related taxes	1	(1)	61	14
Other-than-temporary impairment on held-to-maturity securities related to factors other than credit, net of related taxes	3	7	14	10
Change in net unrealized losses on cash flow hedges, net of related taxes	(33)	(5)	61	(1)
Change in unrealized losses on retirement plans, net of related taxes	1	7	9	9
Other comprehensive income (loss)	409	723	(474)	845
Total comprehensive income	$ 949	$ 1,397	$ 1,109	$ 2,436