Fair Value Measurements (Financial Instruments Not Recorded at Fair Value) (Details) - USD ($) $ in Millions	Mar. 31, 2026	Mar. 31, 2025
Related Party Transaction [Line Items]
Long-term debt, carrying value	$ 6,572	$ 5,790
Debt Instrument, Fair Value Disclosure	6,506	5,652
Related Parties
Related Party Transaction [Line Items]
Other long–term assets	6	3
Other Assets, Fair Value Disclosure	$ 6	$ 3

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

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- Definition

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

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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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