Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Consolidated Statements of Comprehensive Income [Abstract]
Foreign currency translation adjustments, attributable to noncontrolling interest, net of taxes	$ (20)	$ (1)	$ (20)	$ 0
Foreign currency translation adjustments, tax effect	(535)	(22)	(638)	(17)
Foreign currency translation adjustment reclassification - tax effect	0	0	0	224
Unrealized gains (losses) on available-for-sale securities - tax	(49)	(15)	(30)	19
Reclassification adjustment included in net income on available-for-sale securities - tax effect	2	(1)	(3)	(9)
Unrealized gains (losses) on cash flow hedges - tax	(237)	201	(479)	148
Reclassification adjustment included in net income on cash flow hedges - tax effect	6	3	15	14
Amortization of net prior service credit included in net income, tax effect	(131)	(146)	(393)	(435)
Reclassification adjustment in net income on defined benefit postretirement plans - tax effect	$ 0	$ 0	$ 0	$ 33