Segment Information 2 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Revenue from the United States and international locations
Total revenue	$ 1,079		$ 1,105		$ 2,148		$ 2,200
United States [Member]
Revenue from the United States and international locations
Total revenue	656		671		1,299		1,328
EMEA [Member]
Revenue from the United States and international locations
Total revenue	259	[1]	267	[1]	518	[1]	531	[1]
Other [Member]
Revenue from the United States and international locations
Total revenue	$ 164		$ 167		$ 331		$ 341

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