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Commitments and Contingencies (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Mar. 31, 2025
--- | --- | ---
Concentration Risk [Line Items] |  |
Liability for reductions and/or penalties from U.S Government audits | $ 247 | $ 245
Claimed Indirect Costs | Increase To Revenue To Reflect Best Estimate Of Final Cost Rates |  |
Concentration Risk [Line Items] |  |
Liability for reductions and/or penalties from U.S Government audits | $ 247 | $ 245

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