Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 1,129		$ 954
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	9		(2)
Cash flow hedges, net of tax	1		1
Other comprehensive income	10	[1]	(1)	[1]
Comprehensive income	$ 1,139		$ 953

[1] All amounts are net of tax.