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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
Operating Loss Carryforwards [Line Items]      
Effective income tax rate   87.00% 14.00%
Net impact of various items effecting the income tax effective rate   $ (1.7) $ 1.1
Nondeductible expense $ 102.6    
ION Media      
Operating Loss Carryforwards [Line Items]      
Discrete tax provision charge related to nondeductible transaction costs   1.0  
State and Local Jurisdiction      
Operating Loss Carryforwards [Line Items]      
NOL valuation allowance adjustments   $ 1.2 $ 3.5
Net discrete tax provision charge $ 17.1