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v3.25.1

Pension and Employee Benefit Plans, Cost Components of Pension Plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |
Net periodic benefit cost | [1] | $ 4.6 |  | $ 3.3 | $ 2.0 |
U.S. Pension Plans |  |  |  |  |  |
Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |
Service cost |  | 0.2 |  | 0.2 | 0.2 |
Interest cost |  | 9.0 |  | 9.3 | 8.1 |
Expected return on plan assets |  | (8.7) |  | (10.3) | (11.6) |
Amortization of unrecognized net loss |  | 4.7 |  | 4.7 | 5.7 |
Settlements |  | (0.1) | [2] | (0.1) | 0.0 |
Net periodic benefit cost |  | 5.1 |  | 3.8 | 2.4 |
Other Changes in Benefit Obligation Recognized in Other Comprehensive Income [Abstract] |  |  |  |  |  |
Net actuarial gain |  | (8.7) |  | 1.7 | 2.1 |
Amortization of net actuarial loss |  | 4.6 | [3] | 3.9 | 5.7 | [3]
Total recognized in other comprehensive income |  | (4.1) |  | 5.6 | 7.8 |
U.S. Pension Plans | Non-U.S Plans | Maximum |  |  |  |  |  |
Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |
Amortization of unrecognized net loss |  | $ 1.0 |  | 1.0 | $ 1.0 |
U.S. Pension Plans | Non-U.S Plans | Germany Automotive Businesses |  |  |  |  |  |
Other Changes in Benefit Obligation Recognized in Other Comprehensive Income [Abstract] |  |  |  |  |  |
Write-off of net actuarial gains |  |  |  | $ 0.6 |  |
[1] | Net periodic benefit cost for the Company’s pension and postretirement plans is exclusive of service cost.
[2] | The settlement charges resulted from activity associated with the Company’s non-U.S. pension plans.
[3] | The fiscal 2024 amount includes $0.6 million of net actuarial gains written-off as a result of the sale of the Germany automotive businesses. See Note 2 for additional information on the sale of these businesses.

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