Interest And Other Income (Expense), Net (Schedule Of Interest And Other Income (Expense), Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Interest and Other Income [Abstract]
Interest expense	$ (58)	$ (45)	$ (44)
Interest income	4	24	100
Net gain (loss) on foreign currency transactions	(22)	9	11
Net gain (loss) on foreign currency forward contracts	21	(19)	(4)
Other income, net	7	2	0
Interest and other income (expense), net	$ (48)	$ (29)	$ 63