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Fair Value Measurements (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
--- | --- | --- | ---
Fair Value Measurements [Abstract] |  |  |
Investments | $ 6.1 | $ 4.1 |
Deferred compensation obligations | 6.1 | 4.1 |
U.S. Pension Plans |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 150.8 | 150.5 | $ 153.3
U.S. Pension Plans | Money Market Investments |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 2.7 | 6.7 |
U.S. Pension Plans | Fixed Income Securities |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 51.3 | 45.3 |
U.S. Pension Plans | Pooled Equity Funds |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets |  | 7.0 |
U.S. Pension Plans | U.S. Government and Agency Securities |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 87.0 | 57.0 |
U.S. Pension Plans | Other |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 9.8 | 6.8 |
U.S. Pension Plans | Total [Member] |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 150.8 | 122.8 |
U.S. Pension Plans | Level 1 |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 1.4 | 8.1 |
U.S. Pension Plans | Level 1 | Money Market Investments |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
U.S. Pension Plans | Level 1 | Fixed Income Securities |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
U.S. Pension Plans | Level 1 | Pooled Equity Funds |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets |  | 7.0 |
U.S. Pension Plans | Level 1 | U.S. Government and Agency Securities |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 0.0 | 0.0 |
U.S. Pension Plans | Level 1 | Other |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 1.4 | 1.1 |
U.S. Pension Plans | Level 2 |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 149.4 | 114.7 |
U.S. Pension Plans | Level 2 | Money Market Investments |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 2.7 | 6.7 |
U.S. Pension Plans | Level 2 | Fixed Income Securities |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 51.3 | 45.3 |
U.S. Pension Plans | Level 2 | Pooled Equity Funds |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets |  | 0.0 |
U.S. Pension Plans | Level 2 | U.S. Government and Agency Securities |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 87.0 | 57.0 |
U.S. Pension Plans | Level 2 | Other |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | 8.4 | 5.7 |
U.S. Pension Plans | Level 3 |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets | $ 0.0 | 0.0 |
U.S. Pension Plans | Net Asset Value |  |  |
Fair Value Measurements [Abstract] |  |  |
Fair value of plan assets |  | $ 27.7 |

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