Segment Information 2 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Revenue from the United States and international locations
Total revenue	$ 1,163	$ 1,195	$ 3,431	$ 3,492
United States [Member]
Revenue from the United States and international locations
Total revenue	684	701	2,044	2,068
Europe [Member]
Revenue from the United States and international locations
Total revenue	288	291	819	830
Other [Member]
Revenue from the United States and international locations
Total revenue	$ 191	$ 203	$ 568	$ 594