(Schedule Of Amortization Of Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 183	$ 30	$ 22
Asset Impairment Charges	45
Cost of revenue [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	133	4	12
Asset Impairment Charges	11
Operating expenses
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	183	30	22
Asset Impairment Charges	34
Total amortization
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 316	$ 34	$ 34