Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Consolidated Statements of Comprehensive Income [Abstract]
Foreign currency translation adjustments, attributable to noncontrolling interest, net of taxes	$ (1)	$ (1)	$ 0	$ (2)
Foreign currency translation adjustments, tax effect	(22)	(21)	(17)	(86)
Foreign currency translation adjustment reclassification - tax effect	0	0	224	19
Unrealized gains (losses) on available-for-sale securities - tax	(15)	38	19	84
Reclassification adjustment included in net income on available-for-sale securities - tax effect	(1)	(2)	(9)	(7)
Unrealized gains (losses) on cash flow hedges - tax	201	171	148	286
Reclassification adjustment included in net income on cash flow hedges - tax effect	3	4	14	12
Reclassification adjustment in net income on actuarial loss from equity method investees - tax effect	0	0	33	5
Amortization of net prior service credit included in net income, tax effect	$ (146)	$ (109)	$ (435)	$ (327)