INTANGIBLE ASSETS AND GOODWILL - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Change in the carrying amount of goodwill
Balance at the beginning of the period	$ 11,183	$ 11,547
Additions		31
Impairment		(493)
Foreign exchange and other	(23)	98
Balance at the end of the period	11,160	11,183
Bausch + Lomb
Change in the carrying amount of goodwill
Balance at the beginning of the period	5,314	5,246
Additions		31
Impairment		0
Foreign exchange and other	(28)	37
Balance at the end of the period	5,286	5,314
Salix
Change in the carrying amount of goodwill
Balance at the beginning of the period	3,159	3,159
Additions		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
Impairment		0
Foreign exchange and other	(4)	73
Balance at the end of the period	858	862
Solta Medical
Change in the carrying amount of goodwill
Balance at the beginning of the period	115	115
Additions		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
Impairment		(493)
Foreign exchange and other	9	(12)
Balance at the end of the period	$ 1,742	$ 1,733