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Acquisitions and Dispositions - Dispositions (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2022
Apr. 30, 2022
Jun. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Gain on sale of equity method investments       $ 8,000,000 $ 0 $ 141,000,000 $ 4,000,000
The CW Network, LLC | Discontinued Operations, Disposed of by Sale              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Minority interest sale price $ 0            
The CW Network, LLC | Discontinued Operations, Disposed of by Sale | The CW Network, LLC              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Equity method investment, ownership percentage 75.00%     75.00%   75.00%  
Ownership interest retained 12.50%            
Discovery Education | Discontinued Operations, Disposed of by Sale              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Minority interest sale price   $ 138,000,000          
Gain on sale of equity method investments   $ 133,000,000          
Hicks Equity Partners | Great American Country Network | Discontinued Operations, Disposed of by Sale              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Sale price     $ 90,000,000        
Gain on disposal     $ 76,000,000