Interest And Other Income (Expense), Net (Schedule Of Interest And Other Income (Expense), Net) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Interest and Other Income [Abstract]
Interest expense	$ (30)	$ (29)	$ (20)
Interest income	5	6	9
Net gain (loss) on foreign currency transactions	4	2	(29)
Net gain (loss) on foreign currency forward contracts	(5)	(2)	21
Other income, net	0	2	2
Interest and other income (expense), net	$ (26)	$ (21)	$ (17)