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Description of Business and Summary of Significant Accounting Policies - Narrative (Details)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 12 Months Ended 60 Months Ended
Oct. 02, 2023
USD ($)
Jan. 01, 2023
segment
Oct. 31, 2023
USD ($)
Sep. 30, 2023
segment
Dec. 31, 2023
USD ($)
segment
$ / shares
Dec. 31, 2022
USD ($)
$ / shares
Dec. 31, 2021
USD ($)
Dec. 31, 2023
USD ($)
$ / shares
Sep. 30, 2020
$ / shares
Jan. 31, 2018
$ / shares
Accounting Policies [Line Items]                    
Business divestiture, transaction costs $ 22                  
Number of operating segments | segment   3   2 2          
Number of reportable segments | segment   3   2 2          
Revenue from contract with customer, term of customer relationship         15 years          
Accelerated method, average declining balance rate         250.00%          
Advertising expense         $ 165 $ 214 $ 235      
Radio conversion cost, net               $ 276    
Money market funds, at carrying value         $ 55 $ 145   $ 55    
First Lien Term Loan B due 2030 | Line of Credit                    
Accounting Policies [Line Items]                    
Proceeds from (repayments of) debt     $ 230              
First Five Years                    
Accounting Policies [Line Items]                    
Accelerated method, average amortization rate         55.00%          
Second Five Years                    
Accounting Policies [Line Items]                    
Accelerated method, average amortization rate         25.00%          
Final Five Years                    
Accounting Policies [Line Items]                    
Accelerated method, average amortization rate         20.00%          
Commercial Divestiture                    
Accounting Policies [Line Items]                    
Total purchase price, excluding adjustment from divestiture of businesses 1,613                  
Proceeds from divestiture of businesses $ 1,585                  
Class B Common Stock                    
Accounting Policies [Line Items]                    
Common stock, par value (in dollars per share) | $ / shares         $ 0.01 $ 0.01   $ 0.01 $ 0.01 $ 0.01