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Revenue and Contracts in Process - Spectrum Segment Disaggregation of Revenue (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Segment Reporting Information [Line Items]    
Revenue $ 1,637.3 $ 1,205.2
Spectrum    
Segment Reporting Information [Line Items]    
Revenue 38.7 42.0
Broadcast station | Spectrum    
Segment Reporting Information [Line Items]    
Revenue 19.6 18.6
Network advertising | Spectrum    
Segment Reporting Information [Line Items]    
Revenue 14.8 18.1
Network distribution | Spectrum    
Segment Reporting Information [Line Items]    
Revenue 2.8 3.2
Other | Spectrum    
Segment Reporting Information [Line Items]    
Revenue $ 1.5 $ 2.1