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PROPERTY, PLANT AND EQUIPMENT, INTANGIBLE ASSETS AND GOODWILL - Narrative (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 60 Months Ended
Sep. 30, 2023
USD ($)
broadcast_tower_site
Sep. 30, 2023
USD ($)
broadcast_tower_site
Dec. 31, 2023
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2023
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Number of broadcast tower sites sold | broadcast_tower_site 122 122            
Sale leaseback assets $ 45,300,000 $ 45,300,000            
Number of broadcast tower sites entered into operating leases for use | broadcast_tower_site 121 121            
Sale and leaseback realized loss $ 3,200,000              
Indefinite-lived intangibles - licenses     $ 1,113,979,000   $ 1,113,979,000 $ 1,476,319,000   $ 1,113,979,000
Goodwill impairment     0 $ 595,500,000 595,461,000 $ 0 $ 0  
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]           Impairment charges    
Amortization of intangible assets         $ 246,700,000 $ 253,600,000 280,600,000  
Licensing Agreements                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Non-cash impairment charge of intangible assets     $ 0 $ 363,600,000   $ 302,100,000   $ 1,200,000,000
Goodwill impairment   $ 0         $ 0