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LOSS PER SHARE - Schedule of Calculation of Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Earnings Per Share [Abstract]      
Net loss attributable to Bausch Health Companies Inc. $ (225) $ (948) $ (560)
Basic weighted-average common shares outstanding (in shares) 362,000 358,900 355,000
Diluted weighted-average common shares (in shares) 362,000 358,900 355,000
Basic loss per share attributable to Bausch Health Companies Inc. (in dollars per share) $ (0.62) $ (2.64) $ (1.58)
Diluted loss per share attributable to Bausch Health Companies Inc. (in dollars per share) $ (0.62) $ (2.64) $ (1.58)