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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.