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Valuation and Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Accounts receivable previously reserved from customers in Russia $ 1.1    
Receivables Impacted By Russia's Invasion Of Ukraine      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Accounts receivable previously reserved from customers in Russia 2.5    
Returns and Allowances      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 19.3 $ 26.1 $ 33.7
Charged to Costs and Expenses 40.6 44.4 53.3
Charged to Other Accounts 0.0 0.0 0.0
Deductions (42.3) (51.2) (60.9)
Balance at End of Period 17.6 19.3 26.1
Provision for Doubtful Accounts      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 11.5 6.5 9.3
Charged to Costs and Expenses 1.1 5.3 (2.5)
Charged to Other Accounts 0.0 0.0 0.0
Deductions (3.4) (0.3) (0.3)
Balance at End of Period 9.2 11.5 6.5
Deferred Tax Valuation Allowance      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 362.8 350.9 435.8
Charged to Costs and Expenses 115.9 40.4 (56.3)
Charged to Other Accounts (23.0) (28.5) (28.6)
Deductions 0.0 0.0 0.0
Balance at End of Period $ 455.7 $ 362.8 $ 350.9