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Income Taxes (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Unrecognized Tax Benefits $ 64.3   $ 63.7
Valuation Allowance due to Completion of Transaction 37.0    
Valuation Allowance due to planned restructuring $ 3.9    
Effective Income Tax Rate Reconciliation, Percent 23.20% 16.90%  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%