SEGMENT INFORMATION - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 2,153	$ 1,944
Pharmaceuticals
Disaggregation of Revenue [Line Items]
Revenues	935	823
Devices
Disaggregation of Revenue [Line Items]
Revenues	512	479
OTC
Disaggregation of Revenue [Line Items]
Revenues	437	394
Branded and Other Generics
Disaggregation of Revenue [Line Items]
Revenues	245	226
Other revenues
Disaggregation of Revenue [Line Items]
Revenues	24	22
Salix
Disaggregation of Revenue [Line Items]
Revenues	499	496
Salix | Pharmaceuticals
Disaggregation of Revenue [Line Items]
Revenues	499	496
Salix | Devices
Disaggregation of Revenue [Line Items]
Revenues	0	0
Salix | OTC
Disaggregation of Revenue [Line Items]
Revenues	0	0
Salix | Branded and Other Generics
Disaggregation of Revenue [Line Items]
Revenues	0	0
Salix | Other revenues
Disaggregation of Revenue [Line Items]
Revenues	0	0
International
Disaggregation of Revenue [Line Items]
Revenues	265	247
International | Pharmaceuticals
Disaggregation of Revenue [Line Items]
Revenues	56	57
International | Devices
Disaggregation of Revenue [Line Items]
Revenues	0	0
International | OTC
Disaggregation of Revenue [Line Items]
Revenues	41	39
International | Branded and Other Generics
Disaggregation of Revenue [Line Items]
Revenues	153	138
International | Other revenues
Disaggregation of Revenue [Line Items]
Revenues	15	13
Solta Medical
Disaggregation of Revenue [Line Items]
Revenues	88	73
Solta Medical | Pharmaceuticals
Disaggregation of Revenue [Line Items]
Revenues	0	0
Solta Medical | Devices
Disaggregation of Revenue [Line Items]
Revenues	88	73
Solta Medical | OTC
Disaggregation of Revenue [Line Items]
Revenues	0	0
Solta Medical | Branded and Other Generics
Disaggregation of Revenue [Line Items]
Revenues	0	0
Solta Medical | Other revenues
Disaggregation of Revenue [Line Items]
Revenues	0	0
Diversified
Disaggregation of Revenue [Line Items]
Revenues	202	197
Diversified | Pharmaceuticals
Disaggregation of Revenue [Line Items]
Revenues	171	162
Diversified | Devices
Disaggregation of Revenue [Line Items]
Revenues	0	0
Diversified | OTC
Disaggregation of Revenue [Line Items]
Revenues	1	2
Diversified | Branded and Other Generics
Disaggregation of Revenue [Line Items]
Revenues	26	27
Diversified | Other revenues
Disaggregation of Revenue [Line Items]
Revenues	4	6
Bausch + Lomb
Disaggregation of Revenue [Line Items]
Revenues	1,099	931
Bausch + Lomb | Pharmaceuticals
Disaggregation of Revenue [Line Items]
Revenues	209	108
Bausch + Lomb | Devices
Disaggregation of Revenue [Line Items]
Revenues	424	406
Bausch + Lomb | OTC
Disaggregation of Revenue [Line Items]
Revenues	395	353
Bausch + Lomb | Branded and Other Generics
Disaggregation of Revenue [Line Items]
Revenues	66	61
Bausch + Lomb | Other revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 5	$ 3