Debt - Schedule of Interest Expense (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Debt Instrument [Line Items]
Amortization of Debt Issuance Cost (DIC) and Original Issue Discount (OID)	$ 5	$ 6	$ 5
Interest Rate Swaps	(1)	(10)	(15)
Other	0	1	1
Interest expense on debt	212	186	173
Line of Credit \| Credit Agreement \| Term Loan A-1
Debt Instrument [Line Items]
Interest expense, debt, excluding amortization	83	100	108
Line of Credit \| Credit Agreement \| Term Loan A-2
Debt Instrument [Line Items]
Interest expense, debt, excluding amortization	0	0	0
Line of Credit \| Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest expense, debt, excluding amortization	0	1	1
Senior Notes
Debt Instrument [Line Items]
Interest expense, debt, excluding amortization	$ 125	$ 88	$ 73

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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