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Leases (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Lease Assets and Liabilities [Abstract]      
Operating lease ROU assets $ 97.2 $ 76.0  
Operating lease ROU assets, Statement of Financial Position [Extensible List] Other Assets, Noncurrent Other Assets, Noncurrent  
Finance lease ROU assets [1] $ 6.9 $ 6.5  
Finance lease ROU assets, Statement of Financial Position [Extensible List] [1] Property, Plant and Equipment, Net Property, Plant and Equipment, Net  
Operating lease liabilities, current $ 18.0 $ 15.3  
Operating lease liabilities, current, Statement of Financial Position [Extensible List] Other Liabilities, Current Other Liabilities, Current  
Operating lease liabilities, noncurrent $ 80.6 $ 62.1  
Operating lease liabilities, noncurrent, Statement of Financial Position [Extensible List] Other Liabilities, Noncurrent Other Liabilities, Noncurrent  
Finance lease liabilities, current $ 0.5 $ 0.4  
Finance lease liabilities, current, Statement of Financial Position [Extensible List] Long-Term Debt and Lease Obligation, Current Long-Term Debt and Lease Obligation, Current  
Finance lease liabilities, noncurrent $ 2.2 $ 1.9  
Finance lease liabilities, noncurrent, Statement of Financial Position [Extensible List] Long-Term Debt and Lease Obligation Long-Term Debt and Lease Obligation  
Accumulated amortization $ 4.2 $ 3.7  
Components of Lease Expense [Abstract]      
Operating lease expense [2] 31.9 24.2 $ 21.9
Finance lease expense: Depreciation of ROU assets 0.6 0.5 0.5
Finance lease expense: Interest on lease liabilities 0.1 0.1 0.1
Total lease expense 32.6 24.8 22.5
Short-term lease expense 7.3 5.4 5.7
Supplemental Cash Flow Information [Abstract]      
Operating cash flows for operating leases 22.4 16.9 14.6
Financing cash flows for finance leases 0.6 0.5 0.5
ROU assets obtained in exchange for operating lease liabilities 42.2 29.2 $ 21.2
ROU assets obtained in exchange for finance lease liabilities $ 0.9 $ 0.0  
Lease Term and Discount Rates [Abstract]      
Weighted-average remaining lease term: Operating leases 6 years 7 months 6 days 7 years 10 months 24 days  
Weighted-average remaining lease term: Finance leases 6 years 3 months 18 days 4 years 10 months 24 days  
Weighted-average discount rate: Operating leases 5.40% 4.40%  
Weighted-average discount rate: Finance leases 4.80% 4.70%  
Maturity of Operating Lease Liabilities [Abstract]      
Fiscal 2026 $ 22.8    
Fiscal 2027 20.5    
Fiscal 2028 17.8    
Fiscal 2029 14.2    
Fiscal 2030 12.3    
Fiscal 2031 and beyond 30.6    
Total lease payments 118.2    
Less: Interest (19.6)    
Present value of lease liabilities 98.6    
Maturities of Finance Lease Liabilities [Abstract]      
Fiscal 2026 0.6    
Fiscal 2027 0.6    
Fiscal 2028 0.6    
Fiscal 2029 0.5    
Fiscal 2030 0.1    
Fiscal 2031 and beyond 0.7    
Total lease payments 3.1    
Less: interest (0.4)    
Present value of lease liabilities $ 2.7    
Minimum      
Leases [Abstract]      
Remaining lease term 1 year    
Maximum      
Leases [Abstract]      
Remaining lease term 10 years    
[1] Finance lease ROU assets were recorded net of accumulated amortization of $4.2 million and $3.7 million as of March 31, 2025 and 2024, respectively.
[2] In fiscal 2025, 2024, and 2023 operating lease expense included short-term lease expense of $7.3 million, $5.4 million, and $5.7 million respectively. Variable lease expense was not significant.