Segment and Revenue Information - Schedule of Segment Information (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 7,531	$ 7,463	$ 7,562
Cost of revenue	1,584	1,543	1,710
Research and development	2,828	2,569	2,420
Marketing and sales	1,128	962	1,019
General and administrative	763	745	691
Stock-based compensation	656	642	584
Effective tax rate	293	484	316
Net income	887	1,121	1,273
Reportable Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	7,531	7,463	7,562
Cost of revenue	1,536	1,489	1,626
Research and development	2,361	2,112	2,002
Marketing and sales	1,071	906	967
General and administrative	614	625	583
Acquisition-related expenses	131	107	218
Restructuring and related charges	0	62	64
Stock-based compensation	656	642	584
Interest and other (income) expenses, net	(18)	(85)	(71)
Effective tax rate	293	484	316
Net income	$ 887	$ 1,121	$ 1,273

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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