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Acquisitions and Dispositions, Germany Automotive Businesses Held for Sale (Details) € in Millions, $ in Millions |  | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2023 item | Sep. 30, 2025 USD ($) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($) item | Mar. 31, 2023 USD ($) | Dec. 31, 2024 EUR (€)
Disposition of Germany Automotive Businesses [Abstract] |  |  |  |  |  |
Number of automotive businesses sold | item | 3 |  |  | 3 |  |
Gain on sale of businesses |  |  | $ 0.0 | $ 4.0 | $ 0.0 |
Write-off of net actuarial gains |  |  |  | 0.6 |  |
Three Germany Automotive Businesses [Member] |  |  |  |  |  |
Disposition of Germany Automotive Businesses [Abstract] |  |  |  |  |  |
Number of automotive businesses sold | item | 3 |  |  |  |  |
Gain on sale of businesses |  |  |  | 4.0 |  |
Write-off of net actuarial gains |  |  |  | 0.6 |  |
Net sales of disposal group |  |  |  | $ 54.2 | $ 79.0 |
Pending disposition of facilities in germany | Held for Sale |  |  |  |  |  |
Disposition of Germany Automotive Businesses [Abstract] |  |  |  |  |  |
Net transaction price for sale of disposal group |  |  | 12.4 |  |  | € 11.5
Related assets expected |  |  | $ 8.2 |  |  |
Pending disposition of facilities in germany | Forecast | Held for Sale |  |  |  |  |  |
Disposition of Germany Automotive Businesses [Abstract] |  |  |  |  |  |
Net of costs to sell |  | $ 3.0 |  |  |  |

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