Segment Information 2 (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue from the United States and international locations
Total revenue		$ 1,034	$ 1,018	$ 2,059	$ 2,017
United States
Revenue from the United States and international locations
Total revenue		658	657	1,315	1,294
EMEA
Revenue from the United States and international locations
Total revenue	[1]	235	219	464	444
Other
Revenue from the United States and international locations
Total revenue		$ 141	$ 142	$ 280	$ 279

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