Goodwill And Acquisition-Related Intangibles, Net (Schedule Of Acquisition-Related Intangibles) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Dec. 31, 2021	Mar. 31, 2021
Finite-Lived Intangible Assets
Gross carrying amount	$ 1,855	$ 969
Accumulated amortization	(893)	(706)
Acquisition-related intangibles, net	962	263
Intangible Assets, Net (Excluding Goodwill)	1,052	309	[1]
Intangible Assets, Gross (Excluding Goodwill) [Abstract]
Intangible Assets, Gross (Excluding Goodwill)	$ 1,945	$ 1,015
Weighted Average
Finite-Lived Intangible Assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years 3 months 18 days	3 years 6 months
Weighted Average | Glu Mobile Inc. [Member]
Finite-Lived Intangible Assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years 6 months
Weighted Average | Playdemic Limited [Member]
Finite-Lived Intangible Assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 7 months 6 days
In Process Research and Development [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 90	$ 46
Developed And Core Technology
Finite-Lived Intangible Assets
Gross carrying amount	1,107	691
Accumulated amortization	(597)	(472)
Acquisition-related intangibles, net	510	219
Trade Names And Trademarks
Finite-Lived Intangible Assets
Gross carrying amount	607	188
Accumulated amortization	(191)	(144)
Acquisition-related intangibles, net	416	44
Registered User Base And Other Intangibles
Finite-Lived Intangible Assets
Gross carrying amount	56	5
Accumulated amortization	(20)	(5)
Acquisition-related intangibles, net	36	0
Carrier Contracts And Related
Finite-Lived Intangible Assets
Gross carrying amount	85	85
Accumulated amortization	(85)	(85)
Acquisition-related intangibles, net	$ 0	$ 0

[1] Derived from audited Consolidated Financial Statements.