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Leases - Schedule of Lease Expense and Liabilities (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Leases [Abstract]      
Operating lease expense $ 56.6 $ 58.4 $ 63.1
Other assets:      
ROU assets 154.0 153.3  
Accrued liabilities:      
Current portion of lease liabilities 31.5 33.8  
Other long-term liabilities:      
Non-current portion of lease liabilities 128.6 128.9  
Total lease liabilities $ 160.1 $ 162.7  
Right-of-use assets [Extensible List] Other Assets, Noncurrent Other Assets, Noncurrent  
Current portion of lease liabilities [Extensible List] Accrued Liabilities, Current Accrued Liabilities, Current  
Non-current portion of lease liabilities [Extensible List] Other long-term liabilities Other long-term liabilities  
Weighted average remaining lease-term (in years) 6 years 29 days    
Weighted average discount rate 4.35%