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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Billions
Dec. 31, 2024
Dec. 31, 2023
Indefinite-lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 62.2 $ 62.2
Estimated Amortization Expense    
Gross Carrying Amount 56.8 55.3
Accumulated Amortization (34.0) (30.3)
Franchise rights    
Indefinite-lived Intangible Assets [Line Items]    
Gross Carrying Amount 59.4 59.4
FCC licenses    
Indefinite-lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 2.8 2.8
Customer relationships    
Estimated Amortization Expense    
Weighted-average original useful life 13 years  
Gross Carrying Amount $ 20.5 20.8
Accumulated Amortization $ (15.1) (13.3)
Software    
Estimated Amortization Expense    
Weighted-average original useful life 5 years  
Gross Carrying Amount $ 24.9 23.2
Accumulated Amortization $ (16.2) (14.8)
Other agreements and rights    
Estimated Amortization Expense    
Weighted-average original useful life 27 years  
Gross Carrying Amount $ 11.4 11.3
Accumulated Amortization $ (2.7) $ (2.2)