Consolidated Statement of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 409	$ 363
Other comprehensive income (loss), net of related taxes:
Foreign currency translation, net of related taxes of ($64) and $8, respectively	(699)	27
Net unrealized gains (losses) on available-for-sale securities, net of reclassification adjustment and net of related taxes of $123 and $162, respectively	194	259
Net unrealized gains (losses) on available-for-sale securities designated in fair value hedges, net of related taxes of ($10) and ($6), respectively	(15)	(10)
Other-than-temporary impairment on held-to-maturity securities related to factors other than credit, net of related taxes of $3 and $5, respectively	4	8
Net unrealized gains (losses) on cash flow hedges, net of related taxes of ($8) and ($5), respectively	12	(7)
Net unrealized gains on retirement plans, net of related taxes of $4 and $3, respectively	5	6
Other comprehensive income (loss)	(499)	283
Total comprehensive income	$ (90)	$ 646