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Pension and Employee Benefit Plans, Changes in Benefit Obligations, Plan Assets and Funded Status (Details) - U.S. Pension Plans - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year $ 179.3 $ 194.9  
Service cost 0.2 0.2 $ 0.2
Interest cost 9.0 9.3 8.1
Actuarial loss (gain) 6.5 (2.7)  
Benefits paid (14.0) (14.9)  
Disposition of Germany automotive businesses 0.0 (7.4)  
Effect of exchange rate changes 0.1 (0.1)  
Benefit obligation at end of year 181.1 179.3 194.9
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 150.5 153.3  
Actual return on plan assets 6.7 9.4  
Benefits paid (14.0) (14.9)  
Employer contributions 7.6 2.7  
Fair value of plan assets at end of year 150.8 150.5 153.3
Funded status at end of year (30.3) (28.8)  
Amounts Recognized in the Consolidated Balance Sheets [Abstract]      
Current liability (0.9) (1.1)  
Noncurrent liability (29.4) (27.7)  
Total liability (30.3) (28.8)  
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]      
Accumulated benefit obligation 180.2 178.6  
Amounts Recognized in Accumulated Other Comprehensive Loss [Abstract]      
Net actuarial loss (gain) 122.0 117.9  
Non-U.S Plans      
Change in Benefit Obligation [Roll Forward]      
Actuarial loss (gain)   0.5  
Non-U.S Plans      
Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 13.0 21.2  
Actuarial loss (gain) (2.0)    
Benefits paid   (1.8)  
Disposition of Germany automotive businesses   (7.4)  
Service and interest cost 0.6 0.8  
Increase (decrease) in benefit obligation (1.2) (8.2)  
Benefit obligation at end of year 11.8 13.0 21.2
Change in Plan Assets [Roll Forward]      
Employer contributions $ 1.1 $ 1.8 $ 1.5