Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Income and Comprehensive Income [Abstract]
Net income	$ 99	$ 166	$ 177	$ 277
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	44	(393)	19	(375)
Other comprehensive income (loss)	44	(393)	19	(375)
Comprehensive income (loss)	$ 143	$ (227)	$ 196	$ (98)