(Schedule Of Acquisition-Related Intangibles) (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,767	$ 969
Accumulated amortization	(885)	(706)
Acquisition-related intangibles, net	882	263
Intangible Assets, Gross (Excluding Goodwill) [Abstract]
Intangible Assets, Gross (Excluding Goodwill)	1,847	1,015
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible Assets, Net (Excluding Goodwill)	$ 962	$ 309
Weighted Average
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years 2 months 12 days	3 years 6 months
In Process Research and Development
Indefinite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$ 80	$ 46
Developed And Core Technology
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,102	691
Accumulated amortization	(643)	(472)
Acquisition-related intangibles, net	459	219
Trade Names And Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	609	188
Accumulated amortization	(212)	(144)
Acquisition-related intangibles, net	397	44
Registered User Base And Other Intangibles
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	56	5
Accumulated amortization	(30)	(5)
Acquisition-related intangibles, net	26	0
Carrier Contracts And Related
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	0	85
Accumulated amortization	0	(85)
Acquisition-related intangibles, net	$ 0	$ 0

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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