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Balance Sheet Components - Schedule of Accrued Compensation and Benefits and Share-based Compensation (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Mar. 31, 2025
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Accrued bonus, commissions, and cash awards | $ 10 | $ 24
Accrued vacation and sabbatical | 96 | 99
Accrued salaries and fringe benefits | 2 | 12
Employee Stock Purchase Plan liability | 7 | 5
Total accrued compensation and benefits | $ 115 | $ 140

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