Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 212	$ 217
Other comprehensive loss:
Foreign currency translation adjustments	32	10
Total other comprehensive loss	32	10
Comprehensive income	$ 244	$ 227