Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements of Comprehensive Income [Abstract]
Foreign currency translation adjustments, attributable to noncontrolling interest, net of taxes	$ (1)	$ 0	$ 0	$ 0
Foreign currency translation adjustments, tax effect	(55)	73	76	123
Unrealized gains (losses) on available-for-sale securities, tax effect	(27)	2	27	29
Reclassification adjustment realized in net income on available-for-sale securities, tax effect	(3)	(2)	(6)	(21)
Unrealized losses on cash flow hedges, tax effect	(58)	(12)	(58)	(8)
Reclassification adjustment included in net income on cash flow hedges, tax effect	4	2	7	3
Net actuarial loss from equity method investees arising during period - tax effect	(29)	0	(29)	0
Amortization of net prior service credit included in net income, tax effect	$ (87)	$ (66)	$ (171)	$ (137)