Fair Value Measurements - Schedule of Long-Term Debt is Recorded at Amortized Cost (Details) - USD ($) $ in Millions	Sep. 30, 2024	Mar. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 5,744	$ 5,629
Fair Value, Recurring \| Fair value, inputs, level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	5,744	5,629
Fair Value	$ 5,808	$ 5,488

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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+ Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References + Details