SEGMENT INFORMATION - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 2,238	$ 2,046	$ 6,349	$ 5,931
Pharmaceuticals
Disaggregation of Revenue [Line Items]
Revenues	999	935	2,768	2,647
Devices
Disaggregation of Revenue [Line Items]
Revenues	494	462	1,469	1,370
OTC
Disaggregation of Revenue [Line Items]
Revenues	457	405	1,313	1,183
Branded and Other Generics
Disaggregation of Revenue [Line Items]
Revenues	263	220	731	657
Other revenues
Disaggregation of Revenue [Line Items]
Revenues	25	24	68	74
Salix
Disaggregation of Revenue [Line Items]
Revenues	614	544	1,667	1,509
Salix | Pharmaceuticals
Disaggregation of Revenue [Line Items]
Revenues	613	543	1,668	1,508
Salix | Devices
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Salix | OTC
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Salix | Branded and Other Generics
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Salix | Other revenues
Disaggregation of Revenue [Line Items]
Revenues	1	1	(1)	1
International
Disaggregation of Revenue [Line Items]
Revenues	275	250	781	727
International | Pharmaceuticals
Disaggregation of Revenue [Line Items]
Revenues	63	68	178	192
International | Devices
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
International | OTC
Disaggregation of Revenue [Line Items]
Revenues	47	39	125	112
International | Branded and Other Generics
Disaggregation of Revenue [Line Items]
Revenues	151	131	438	385
International | Other revenues
Disaggregation of Revenue [Line Items]
Revenues	14	12	40	38
Solta Medical
Disaggregation of Revenue [Line Items]
Revenues	83	72	244	201
Solta Medical | Pharmaceuticals
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Solta Medical | Devices
Disaggregation of Revenue [Line Items]
Revenues	83	72	244	201
Solta Medical | OTC
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Solta Medical | Branded and Other Generics
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Solta Medical | Other revenues
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Diversified
Disaggregation of Revenue [Line Items]
Revenues	259	238	684	722
Diversified | Pharmaceuticals
Disaggregation of Revenue [Line Items]
Revenues	210	206	567	608
Diversified | Devices
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Diversified | OTC
Disaggregation of Revenue [Line Items]
Revenues	2	2	6	5
Diversified | Branded and Other Generics
Disaggregation of Revenue [Line Items]
Revenues	40	24	92	91
Diversified | Other revenues
Disaggregation of Revenue [Line Items]
Revenues	7	6	19	18
Bausch + Lomb
Disaggregation of Revenue [Line Items]
Revenues	1,007	942	2,973	2,772
Bausch + Lomb | Pharmaceuticals
Disaggregation of Revenue [Line Items]
Revenues	113	118	355	339
Bausch + Lomb | Devices
Disaggregation of Revenue [Line Items]
Revenues	411	390	1,225	1,169
Bausch + Lomb | OTC
Disaggregation of Revenue [Line Items]
Revenues	408	364	1,182	1,066
Bausch + Lomb | Branded and Other Generics
Disaggregation of Revenue [Line Items]
Revenues	72	65	201	181
Bausch + Lomb | Other revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 3	$ 5	$ 10	$ 17