Consolidated Statement of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Foreign currency translation, Taxes	$ (14)	$ (51)	$ (24)	$ (76)
Change in net unrealized losses on available-for-sale securities, Taxes	(11)	27	347	(48)
Change in net unrealized losses on available-for-sale securities designated in fair value hedges, Taxes	9	(10)	(6)	(5)
Other-than-temporary impairment on held-to-maturity securities related to factors other than credit, Taxes	1	2	3	6
Change in net unrealized losses on cash flow hedges, Taxes	(27)	17	(144)	39
Change in unrealized losses on retirement plans, Taxes	$ (1)	$ 3	$ 2	$ 4