v3.26.1
EARNINGS (LOSS) PER SHARE - Calculation of Loss 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
Earnings Per Share [Abstract]        
Net income (loss) attributable to Bausch Health Companies Inc. $ 258 $ 148 $ (1,165) $ 90
Basic weighted-average common shares outstanding (in shares) 375.0 370.9 373.9 370.3
Diluted effect of stock options and RSUs (in shares) 3.1 2.2 0.0 3.2
Diluted weighted-average common shares outstanding (in shares) 378.1 373.1 373.9 373.5
Basic loss per share attributable to Bausch Health Companies Inc. (in usd per share) $ 0.69 $ 0.40 $ (3.12) $ 0.24
Diluted loss per share attributable to Bausch Health Companies Inc. (in usd per share) $ 0.68 $ 0.40 $ (3.12) $ 0.24