v3.26.1
Pension and Employee Benefit Plans, Changes in Benefit Obligations, Plan Assets and Funded Status (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at end of year $ 0.0    
U.S. Pension Plans      
Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 181.1 $ 179.3  
Service cost 0.2 0.2 $ 0.2
Interest cost 6.5 9.0 9.3
Actuarial (gain) loss (6.4) 6.5  
Benefits paid (13.7) (14.0)  
Pension termination settlement (156.1) 0.0  
Effect of exchange rate changes 0.7 0.1  
Benefit obligation at end of year 12.3 181.1 179.3
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 150.8 150.5  
Actual return on plan assets 2.8 6.7  
Benefits paid (13.7) (14.0)  
Pension termination settlement (156.1)    
Employer contributions 16.2 7.6  
Fair value of plan assets at end of year   150.8 150.5
Funded status at end of year (12.3) (30.3)  
Amounts Recognized in the Consolidated Balance Sheets      
Current liability (0.9) (0.9)  
Noncurrent liability (11.4) (29.4)  
Total liability (12.3) (30.3)  
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets      
Accumulated benefit obligation 11.9 180.2  
Amounts Recognized in Accumulated Other Comprehensive Loss      
Net actuarial loss (gain) 0.5 122.0  
U.S. Pension Plans | Non-U.S Plans      
Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 11.8 13.0  
Actuarial (gain) loss 0.5 2.0  
Benefits paid (1.3)    
Service and interest cost 0.7 0.6  
Increase (decrease) in benefit obligation (0.1) (1.2)  
Benefit obligation at end of year 11.7 11.8 13.0
U.S. Pension Plans | Non-U.S Plans      
Change in Plan Assets [Roll Forward]      
Employer contributions $ 1.3 $ 1.1 $ 1.8