Segment Information (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Revenue, Major Customer and Geographic Information [Line Items]
Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries	$ 6,991	$ 5,629	$ 5,537
Entity Wide Revenue By Major Customer Percent Of Revenue Did Not Exceed Ten Percent	10.00%
Sales Revenue, Net [Member] \| Customer Concentration Risk [Member] \| Sony [Member]
Revenue, Major Customer and Geographic Information [Line Items]
Entity Wide Revenue By Major Customer Percent Of Revenue	33.00%	36.00%	32.00%
Sales Revenue, Net [Member] \| Customer Concentration Risk [Member] \| Microsoft [Member]
Revenue, Major Customer and Geographic Information [Line Items]
Entity Wide Revenue By Major Customer Percent Of Revenue	16.00%	18.00%	17.00%
Switzerland [Member]
Revenue, Major Customer and Geographic Information [Line Items]
Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries	$ 3,423	$ 2,731	$ 2,586
Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries, Percentage	49.00%	49.00%	47.00%
United States [Member]
Revenue, Major Customer and Geographic Information [Line Items]
Disclosure on Geographic Areas, Revenue from External Customers Attributed to Entity's Country of Domicile	99.00%

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