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Capital Stock and Share-Based Compensation Plans - Narrative (Details)
$ / shares in Units, shares in Thousands
 12 Months Ended 41 Months Ended
Jan. 07, 2021
USD ($)
$ / shares
shares
Dec. 31, 2022
USD ($)
director
classOfCommonShare
shares
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Mar. 31, 2020
USD ($)
Jun. 30, 2022
$ / shares
May 14, 2021
USD ($)
Feb. 28, 2020
USD ($)
Nov. 30, 2016
USD ($)
Class of Stock [Line Items]                  
Classes of common shares | classOfCommonShare   2              
Number of directors as a percentage   33.33%              
Share price | $ / shares           $ 12.47      
Preferred stock dividends   $ 48,000,000 $ 47,067,000            
Number of shares available for future stock compensation grants | shares   4,600              
ION Media                  
Class of Stock [Line Items]                  
Exercise price of warrants | $ / shares $ 13                
Berkshire Hathaway | Level 3                  
Class of Stock [Line Items]                  
Fair value of warrants $ 181,000,000           $ 280,000,000    
Maximum                  
Class of Stock [Line Items]                  
Minimum number of directors up for election, on which common shareholders entitled to vote | director   3              
Preferred Stock | Berkshire Hathaway | ION Media                  
Class of Stock [Line Items]                  
Purchase of equity $ 600,000,000                
Number of shares purchased | shares 6                
Share price | $ / shares $ 100,000                
Preferred stock, redemption price, percent 105.00%                
Preferred stock, dividend rate, percentage 8.00%                
Dividend rate if previous dividends are not paid in cash, as a percentage 9.00%                
Preferred stock dividends   $ 48,000,000 45,100,000            
Number of warrants | shares 23,100                
Exercise price of warrants | $ / shares $ 13                
Common Stock                  
Class of Stock [Line Items]                  
Stock repurchased during period, value         $ 50,300,000        
Common stock, Class A                  
Class of Stock [Line Items]                  
Stock repurchase program, authorized amount               $ 100,000,000 $ 100,000,000
Stock repurchased during period, value   0 $ 0 $ 0          
Common stock, Class A | ION Media                  
Class of Stock [Line Items]                  
Number of warrants | shares 23,100                
Restricted stock units                  
Class of Stock [Line Items]                  
Total unrecognized compensation cost related to restricted stock, RSUs and performance shares   $ 33,100,000              
Weighted-average period of recognition, years   2 years 3 months 18 days              
Restricted stock units | Minimum                  
Class of Stock [Line Items]                  
Vesting period of stock options   3 years              
Restricted stock units | Maximum                  
Class of Stock [Line Items]                  
Vesting period of stock options   4 years