Financing Arrangement (Schedule Of Interest Expense Related To Notes) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Instruments [Abstract]
Amortization of debt issuance costs	$ 0	$ (1)	$ (1)	$ (1)
Coupon interest expense	(14)	(14)	(28)	(28)
Total interest expense	$ (14)	$ (15)	$ (29)	$ (29)