Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Consolidated Statement of Comprehensive Income [Abstract]
Net income	$ 59	$ 51
Other comprehensive income:
Foreign currency translation adjustments, net of tax	308	53
Other comprehensive income	308	53
Comprehensive income	$ 367	$ 104