Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 363	$ 464
Other comprehensive income (loss), net of related taxes:
Foreign currency translation, net of related taxes of $8 and ($64), respectively	27	(248)
Change in net unrealized gains on available-for-sale securities, net of reclassification adjustment and net of related taxes of $162 and $29, respectively	259	51
Change in net unrealized gains (losses) on available-for-sale securities designated in fair value hedges, net of related taxes of ($6) and $9, respectively	(10)	15
Other-than-temporary impairment on held-to-maturity securities related to factors other than credit, net of related taxes of $5 and $4, respectively	8	6
Change in net unrealized losses on cash flow hedges, net of related taxes of ($5) and $41, respectively	(7)	64
Change in net unrealized losses on retirement plans, net of related taxes of $3 and $2, respectively	6	3
Other comprehensive income (loss)	283	(109)
Total comprehensive income	$ 646	$ 355