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, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share [Abstract]
Net loss attributable to Bausch Health Companies Inc.	$ (592)	$ (225)	$ (948)
Basic weighted-average common shares outstanding (in shares)	364,900	362,000	358,900
Diluted weighted-average common shares (in shares)	364,900	362,000	358,900
Basic loss per share attributable to Bausch Health Companies Inc. (in dollars per share)	$ (1.62)	$ (0.62)	$ (2.64)
Diluted loss per share attributable to Bausch Health Companies Inc. (in dollars per share)	$ (1.62)	$ (0.62)	$ (2.64)