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Stock-based Compensation - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]
Unrecognized compensation cost	$ 68	$ 62
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	5 years
Annual Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	1 year 8 months 12 days

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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