Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Consolidated Statements of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax effect	$ 136	$ 1	$ 126	$ (103)
Unrealized gains (losses) on available-for-sale securities - tax	2	0	(13)	19
Reclassification adjustment included in net income on available-for-sale securities - tax effect	2	(2)	0	(5)
Unrealized gains (losses) on cash flow hedges - tax	(208)	(52)	(141)	(242)
Reclassification adjustment included in net income on cash flow hedges - tax effect	5	5	10	9
Amortization of net prior service credit included in net income, tax effect	$ (131)	$ (131)	$ (262)	$ (262)