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Revenue Recognition (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenues [Abstract]        
Deferred Revenue, Revenue Recognized   $ 818.4    
Concentration Risk [Line Items]        
.tv Deferred Revenue Recognized $ 8.4      
Customer Concentration Risk [Member] | Concentration Risk Benchmark [Domain] | Other Customer        
Concentration Risk [Line Items]        
Concentration Risk, Percentage   32.00% 33.00% 34.00%