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INTANGIBLE ASSETS AND GOODWILL - Changes in Carrying Amount of Goodwill (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Change in the carrying amount of goodwill    
Balance at the beginning of the period $ 11,183 $ 11,547
Additions 2 31
Impairment   (493)
Foreign exchange and other (14) 98
Balance at the end of the period 11,171 11,183
Bausch + Lomb    
Change in the carrying amount of goodwill    
Balance at the beginning of the period 5,314 5,246
Additions 2 31
Impairment   0
Foreign exchange and other 4 37
Balance at the end of the period 5,320 5,314
Salix    
Change in the carrying amount of goodwill    
Balance at the beginning of the period 3,159 3,159
Additions 0 0
Impairment   0
Foreign exchange and other 0 0
Balance at the end of the period 3,159 3,159
International    
Change in the carrying amount of goodwill    
Balance at the beginning of the period 862 789
Additions 0 0
Impairment   0
Foreign exchange and other (16) 73
Balance at the end of the period 846 862
Solta Medical    
Change in the carrying amount of goodwill    
Balance at the beginning of the period 115 115
Additions 0 0
Impairment   0
Foreign exchange and other 0 0
Balance at the end of the period 115 115
Diversified    
Change in the carrying amount of goodwill    
Balance at the beginning of the period 1,733 2,238
Additions 0 0
Impairment   (493)
Foreign exchange and other (2) (12)
Balance at the end of the period $ 1,731 $ 1,733