Debt - Schedule of Debt (Details) - USD ($) $ in Millions	Sep. 30, 2026	Mar. 31, 2026
Debt Instrument [Line Items]
Less: Unamortized debt issuance costs and discount on debt	$ (31)	$ (24)
Total	4,410	3,940
Less: Current portion of long-term debt	(19)	(19)
Long-term debt, net of current portion	$ 4,391	$ 3,921
Term Loans \| Credit Agreement \| Term Loan A-1
Debt Instrument [Line Items]
Interest Rate	0.00%	5.018%
Outstanding Balance	$ 0	$ 714
Term Loans \| Credit Agreement \| Term Loan A-2
Debt Instrument [Line Items]
Interest Rate	4.936%	4.923%
Outstanding Balance	$ 741	$ 750
Senior Notes \| Senior Notes due 2028
Debt Instrument [Line Items]
Interest Rate	3.875%	3.875%
Outstanding Balance	$ 700	$ 700
Senior Notes \| Senior Notes due 2029
Debt Instrument [Line Items]
Interest Rate	4.00%	4.00%
Outstanding Balance	$ 500	$ 500
Senior Notes \| Senior Notes due 2030
Debt Instrument [Line Items]
Interest Rate	5.375%	0.00%
Outstanding Balance	$ 700	$ 0
Senior Notes \| Senior Notes due 2033
Debt Instrument [Line Items]
Interest Rate	5.95%	5.95%
Outstanding Balance	$ 650	$ 650
Senior Notes \| Senior Notes due 2034
Debt Instrument [Line Items]
Interest Rate	5.90%	0.00%
Outstanding Balance	$ 500	$ 0
Senior Notes \| Senior Notes due 2035
Debt Instrument [Line Items]
Interest Rate	5.95%	5.95%
Outstanding Balance	$ 650	$ 650

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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