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Acquisitions and Dispositions, Disposition of Two Coatings Facilities (Details) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 Facility | Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($)
Disposition of Two Coatings Facilities [Abstract] |  |  |  |
Number of coatings facilities sold | Facility | 2 |  |  |
Gain on sale of businesses |  | $ 4.0 | $ 0.0 | $ (6.6)
Two Coatings Facilities [Member] |  |  |  |
Disposition of Two Coatings Facilities [Abstract] |  |  |  |
Net sales of disposed businesses |  |  | $ 6.4 |
Goodwill attributable to disposed businesses written off |  | 0.7 |  |
Two Coatings Facilities [Member] | Maximum [Member] |  |  |  |
Disposition of Two Coatings Facilities [Abstract] |  |  |  |
Gain on sale of businesses |  | $ 0.1 |  |

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