Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Consolidated Statements of Comprehensive Income [Abstract]
Foreign currency translation adjustments, attributable to noncontrolling interest, net of taxes	$ 0	$ 0
Foreign currency translation adjustments, tax effect	(9)	62
Foreign currency translation adjustment reclassification - tax effect	14	0
Net unrealized gains (losses) on available-for-sale securities - tax effect	10	40
Reclassification adjustment included in net income on available-for-sale securities - tax effect	(7)	(4)
Net unrealized gains (losses) on cash flow hedges - tax effect	3	49
Reclassification adjustment included in net income on cash flow hedges - tax effect	4	4
Reclassification adjustment in net income on actuarial loss from equity method investees - tax effect	2	0
Amortization of net prior service credit included in net income, tax effect	$ (147)	$ (109)