Segment Information 2 (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue from the United States and international locations
Revenue		$ 1,018	$ 1,005	$ 2,017	$ 1,982
United States
Revenue from the United States and international locations
Revenue		657	645	1,294	1,264
EMEA
Revenue from the United States and international locations
Revenue	[1]	219	228	444	449
Other
Revenue from the United States and international locations
Revenue		$ 142	$ 132	$ 279	$ 269

[1] Consists of Europe, the Middle East and Africa.