v3.25.4
Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 01, 2025
Dec. 01, 2024
Dec. 01, 2023
Jun. 30, 2024
Dec. 31, 2023
Jun. 30, 2023
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Goodwill [Line Items]                  
Accumulated impairment charges             $ 649,600,000 $ 556,200,000  
Impairment charge related to goodwill       $ 68,000,000     93,384,000 370,698,000  
Remaining goodwill eliminated upon sale of interest     $ 2,400,000            
Aggregate amortization expense for amortizable intangible assets             31,000,000.0 33,900,000 $ 40,500,000
Impairment charges for indefinite-lived intangible assets $ 4,400,000                
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] Impairment and other charges                
Impairment charges for long-lived assets             0    
AMCNI Reporting Unit                  
Goodwill [Line Items]                  
Impairment charge related to goodwill $ 93,400,000 $ 34,000,000              
Goodwill, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration] Impairment and other charges                
Domestic Operations                  
Goodwill [Line Items]                  
Impairment charge related to goodwill   $ 268,700,000              
Reporting unit exceeded its respective carrying value percentage 6.00%                
BBC America                  
Goodwill [Line Items]                  
Impairment charges for long-lived assets               71,600,000 71,600,000
25/7 Media                  
Goodwill [Line Items]                  
Impairment charges for long-lived assets               23,000,000 $ 23,000,000
Domestic Operations                  
Goodwill [Line Items]                  
Accumulated impairment charges             268,700,000 268,700,000  
Impairment charge related to goodwill             0 268,694,000  
Impairment charges for long-lived assets       13,500,000          
Impairment of identifiable intangible assets       $ 15,700,000 $ 42,400,000        
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]         Impairment and other charges        
International                  
Goodwill [Line Items]                  
Accumulated impairment charges             380,900,000 287,500,000  
Impairment charge related to goodwill           $ 1,900,000 $ 93,384,000 $ 102,004,000  
Impairment of identifiable intangible assets           $ 23,000,000      
International | 25/7 Media                  
Goodwill [Line Items]                  
Impairment charge related to goodwill     $ 19,800,000