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Pensions (Details) - USD ($)
$ in Millions
 3 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Net Periodic Benefit Cost [Abstract]    
Net periodic benefit cost [1] $ 0.8 $ 0.7
Pension [Member]    
Net Periodic Benefit Cost [Abstract]    
Service cost 0.1 0.1
Interest cost 2.0 2.3
Expected return on plan assets (2.9) (3.0)
Amortization of unrecognized net loss 1.7 1.5
Net periodic benefit cost 0.9 0.9
Pension [Member] | United States [Member]    
Employer Contributions [Abstract]    
Employer contributions 0.0 $ 0.9
Employer contributions expected to be contributed during fiscal 2021 $ 20.0  
[1] Net periodic benefit cost for the Company’s pension and postretirement plans is exclusive of service cost.