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REDEEMABLE NONCONTROLLING INTERESTS - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Aug. 31, 2023
Jul. 31, 2023
Dec. 31, 2021
Dec. 31, 2018
Discovery Japan, Inc. ("JVCo")          
Redeemable Noncontrolling Interest [Line Items]          
Equity method investment, ownership (as a percent)   51.00% 80.00%    
JCOM Co., Ltd. ("JCOM") | Discovery Japan, Inc. ("JVCo")          
Redeemable Noncontrolling Interest [Line Items]          
Equity method investment, ownership (as a percent)   49.00% 20.00%    
MotorTrend Group, LLC Joint Venture | GoldenTree Asset Management, L.P.          
Redeemable Noncontrolling Interest [Line Items]          
Ownership percentage by noncontrolling owners (as a percent)         32.50%
Discovery Family | Hasbro Inc.          
Redeemable Noncontrolling Interest [Line Items]          
Ownership percentage by noncontrolling owners (as a percent)       40.00%  
MotorTrend Group, LLC Joint Venture          
Redeemable Noncontrolling Interest [Line Items]          
Percentage of voting interests acquired (as a percent) 32.50%        
Total consideration paid $ 49