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ACQUISITIONS, LICENSING AGREEMENTS AND DIVESTITURE - Pro Forma Information (Details) - XIIDRA® And Certain Other Ophthalmology Assets Acquisition - Bausch + Lomb - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Business Acquisition [Line Items] |  |
Revenues | $ 9,006 | $ 8,611
Net loss | (822) | (507)
Net loss attributable to Bausch Health Companies Inc. | $ (762) | $ (498)

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