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SUPPLEMENTAL DISCLOSURES - Schedule of Net Income (Loss) Available to Warner Bros. Discovery, Inc. Series A Common Stockholders for Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Numerator:        
Net income (loss) $ 162 $ 1,588 $ (2,744) $ 1,139
Less:        
Net income attributable to noncontrolling interests (13) (7) (23) (15)
Net (income) loss attributable to redeemable noncontrolling interests 0 (1) 0 3
Net loss available to Warner Bros. Discovery, Inc. Series A common stockholders for basic earnings per share 149 1,580 (2,767) 1,127
Net loss available to Warner Bros. Discovery, Inc. Series A common stockholders for diluted earnings per share $ 149 $ 1,580 $ (2,767) $ 1,127
Denominator — weighted average:        
Common shares outstanding — basic (in shares) 2,511 2,477 2,501 2,469
Dilutive effect of share-based awards (in shares) 64 22 0 31
Common shares outstanding — diluted (in shares) 2,575 2,499 2,501 2,500
Basic net loss per share allocated to common stockholders (in dollars per share) $ 0.06 $ 0.64 $ (1.11) $ 0.46
Diluted net loss per share allocated to common stockholders (in dollars per share) $ 0.06 $ 0.63 $ (1.11) $ 0.45