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Fair Value Measurements (Tables) | 6 Months Ended
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Sep. 30, 2025
Fair Value Disclosures [Abstract] |
Schedule of Carrying Value and Estimated Fair Value of Long-Term Debt | The Company’s long-term debt is recorded at amortized cost. The carrying value and fair value of the Company’s long-term debt was as follows:
| September 30, 2025 |  | March 31, 2025 |  |
(In millions) | Carrying Value |  | Fair Value |  | Carrying Value |  | Fair Value |  |
Long-term debt, including current maturities | $ | 7,758 |  |  | $ | 7,831 |  |  | $ | 5,654 |  |  | $ | 5,598 |  |  |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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