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Valuation and Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Returns and Allowances      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period $ 26.1 $ 33.7 $ 35.0
Charged to Costs and Expenses 44.4 53.3 81.2
Charged to Other Accounts 0.0 0.0 0.0
Deductions (51.2) (60.9) (82.5)
Balance at End of Period 19.3 26.1 33.7
Provision for Doubtful Accounts      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 6.5 9.3 5.4
Charged to Costs and Expenses 5.3 (2.5) 5.7
Charged to Other Accounts 0.0 0.0 0.0
Deductions (0.3) (0.3) (1.8)
Balance at End of Period 11.5 6.5 9.3
Deferred Tax Valuation Allowance      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 350.9 435.8 401.1
Charged to Costs and Expenses 40.4 (56.3) 4.5
Charged to Other Accounts (28.5) (28.6) 30.2
Deductions 0.0 0.0 0.0
Balance at End of Period $ 362.8 $ 350.9 $ 435.8