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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Interest And Penalties [Abstract]      
Change in unrecognized tax benefit $ 7.3    
Unrecognized tax benefits 32.2    
Unrecognized tax benefits that would impact effective tax rate 16.9    
Unrecognized tax benefits, income tax penalties and interest accrued 7.1   $ 7.4
Income Tax (Expense) Benefit, Continuing Operations [Abstract]      
Effective income tax rate reconciliation, other expense (benefit) reconciling items, amount 28.3 $ 0.4  
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount 25.1    
Refund of Future Alternative Minimum Tax Credits 5.5    
Excess Tax Benefit from Share-based Compensation, Financing Activities 1.7    
Other Tax Expense (Benefit) 12.6    
United States Tax Cuts and Jobs Act Law      
Income Tax (Expense) Benefit, Continuing Operations [Abstract]      
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount $ 0.6