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Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Income Tax Contingency [Line Items]    
Unrecognized income tax benefits that would affect effective tax rate $ 251.1 $ 227.9
Unrecognized tax benefits 63.7 64.1
Accrued or deferred taxes relating to uncertain income tax positions 54.9 57.1
Accrued interest and penalties relating to unrecognized tax benefits 41.6 39.4
Valuation Allowance [Abstract]    
Decrease in valuation allowance 67.8  
Other noncurrent liabilities    
Income Tax Contingency [Line Items]    
Noncurrent liability for uncertain tax positions 193.4 163.8
Deferred Income Tax Liabilities, Net    
Income Tax Contingency [Line Items]    
Noncurrent liability for uncertain tax positions $ 2.8 $ 7.0