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Pensions (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Net periodic benefit cost | [1] | $ 0.8 | $ 0.7 | $ 2.3 | $ 2.1
Pension [Member] |  |  |  |  |
Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Service cost |  | 0.1 | 0.1 | 0.3 | 0.3
Interest cost |  | 2.0 | 2.3 | 5.9 | 6.8
Expected return on plan assets |  | (2.9) | (3.0) | (8.6) | (8.9)
Amortization of unrecognized net loss |  | 1.7 | 1.5 | 5.2 | 4.5
Net periodic benefit cost |  | 0.9 | $ 0.9 | 2.8 | 2.7
Pension [Member] | United States [Member] |  |  |  |  |
Employer Contributions [Abstract] |  |  |  |  |
Employer contributions |  |  |  | 8.8 | $ 2.6
Remaining employer contributions expected to be contributed during fiscal 2021 |  | $ 10.0 |  | $ 10.0 |
[1] | Net periodic benefit cost for the Company’s pension and postretirement plans is exclusive of service cost.

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