Consolidated Statement of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Foreign currency translation, net of related taxes of	$ 39	$ 29	$ (25)	$ 37
Change in net unrealized losses on available-for-sale securities, net of reclassification adjustment and net of related taxes of	(198)	193	(75)	355
Change in net unrealized losses on available-for-sale securities designated in fair value hedges, net of related taxes of	15	(9)	5	(15)
Other-than-temporary impairment on held-to-maturity securities related to factors other than credit, net of related taxes of	1	3	4	8
Change in net unrealized losses on cash flow hedges, net of related taxes of	30	2	22	(3)
Change in unrealized losses on retirement plans, net of related taxes of	$ (3)	$ (8)	$ 1	$ (5)