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Goodwill And Acquisition-Related Intangibles, Net - Narrative (Details) $ in Millions	12 Months Ended
	Mar. 31, 2026 USD ($) acquisition	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)
Finite-Lived Intangible Assets [Line Items]
Business combination, number of immaterial acquisitions \| acquisition	1
Asset impairment charges	$ 0	$ 0	$ 70
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	7 years
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	2 years
Weighted Average
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, weighted average useful life	2 years 3 months 18 days	3 years 2 months 12 days
Operating expenses
Finite-Lived Intangible Assets [Line Items]
Asset impairment charges			53
Cost of revenue
Finite-Lived Intangible Assets [Line Items]
Asset impairment charges			$ 17