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Assets Held for Sale and Discontinued Operations - Additional Information (Details) - USD ($)
$ in Millions
6 Months Ended
Jul. 10, 2020
Dec. 31, 2020
Subsequent Event | Scenario, Forecast | Nexstar Media Group, Inc.    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Proceeds from Divestiture of Businesses and Interests in Affiliates   $ 75
Disposed of by sale | Stitcher Podcasting Business    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Disposal Group, Including Discontinued Operation, Consideration $ 325  
Proceeds from Divestiture of Interest in Consolidated Subsidiaries 265  
Disposed of by sale | Earnout | Stitcher Podcasting Business    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Disposal Group, Including Discontinued Operation, Earnout Based 2020 Financial Results 30  
Disposed of by sale | Earnout Based On 2021 Financial Results | Stitcher Podcasting Business    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Disposal Group, Including Discontinued Operation, Earnout Based 2020 Financial Results $ 30