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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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INTANGIBLE ASSETS AND GOODWILL - Narrative (Details)				2 Months Ended	3 Months Ended						9 Months Ended		12 Months Ended
INTANGIBLE ASSETS AND GOODWILL - Narrative (Details)	Sep. 30, 2023 USD ($)	Oct. 01, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($) reporting_unit	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Goodwill [Line Items]
Asset impairments					$ 4,000,000			$ 1,000,000			$ 54,000,000	$ 15,000,000
Finite-lived intangible assets	$ 5,025,000,000				5,025,000,000		$ 4,102,000,000				5,025,000,000		$ 4,102,000,000
Goodwill impairment											402,000,000		824,000,000
Goodwill	11,187,000,000				11,187,000,000		11,547,000,000				11,187,000,000		11,547,000,000	$ 12,457,000,000
Accumulated goodwill impairment charges	5,406,000,000				5,406,000,000						5,406,000,000
Bausch + Lomb
Goodwill [Line Items]
Number of reporting units \| reporting_unit				3
Salix
Goodwill [Line Items]
Goodwill impairment											0		0
Goodwill	$ 3,159,000,000				$ 3,159,000,000		$ 3,159,000,000				$ 3,159,000,000		$ 3,159,000,000	$ 3,159,000,000
Dermatology Reporting Unit
Goodwill [Line Items]
Reporting unit, impairment test, long-term growth rate			1.00%	1.00%				1.00%	1.00%	1.00%		1.00%
Reporting unit, impairment test, estimated cash flows, discount rate			10.50%	10.00%				10.50%	10.00%	9.00%		10.50%
Fair value of reporting value, greater than its carrying value										2.00%
Goodwill impairment								$ 119,000,000	$ 83,000,000	$ 0
Reporting unit, impairment test, estimated cash flows, change in discount rate				1.00%					1.00%
Goodwill			$ 480,000,000					$ 480,000,000				$ 480,000,000
Dermatology Reporting Unit \| Bausch + Lomb
Goodwill [Line Items]
Reporting unit, impairment test, long-term growth rate	0.00%				0.00%						0.00%
Reporting unit, impairment test, estimated cash flows, discount rate	10.75%				10.75%						10.75%
Goodwill impairment					$ 151,000,000
Goodwill	$ 329,000,000				$ 329,000,000						$ 329,000,000
Vision Care, Surgical and Pharmaceuticals Reporting Units \| Bausch + Lomb
Goodwill [Line Items]
Fair value of reporting value, greater than its carrying value				25.00%			25.00%		25.00%				25.00%
Goodwill impairment				$ 0			$ 0
Salix Reporting Unit
Goodwill [Line Items]
Reporting unit, impairment test, long-term growth rate			2.50%					2.50%				2.50%
Fair value of reporting value, greater than its carrying value			5.00%					5.00%				5.00%
Goodwill impairment			$ 0
Neurology Reporting Unit
Goodwill [Line Items]
Reporting unit, impairment test, long-term growth rate							(2.50%)						(2.50%)
Reporting unit, impairment test, estimated cash flows, discount rate							10.25%						10.25%
Goodwill impairment		$ 622,000,000
Goodwill							$ 1,439,000,000						$ 1,439,000,000
Neurology Reporting Unit \| Bausch + Lomb
Goodwill [Line Items]
Reporting unit, impairment test, long-term growth rate	(2.50%)				(2.50%)						(2.50%)
Reporting unit, impairment test, estimated cash flows, discount rate	10.50%				10.50%						10.50%
Goodwill impairment					$ 251,000,000
Goodwill	$ 1,192,000,000				1,192,000,000						$ 1,192,000,000
Minimum \| Vision Care, Surgical and Pharmaceuticals Reporting Units \| Bausch + Lomb
Goodwill [Line Items]
Reporting unit, impairment test, long-term growth rate				2.00%			2.00%		2.00%				2.00%
Reporting unit, impairment test, estimated cash flows, discount rate				9.00%			9.50%		9.00%				9.50%
Minimum \| Salix Reporting Unit
Goodwill [Line Items]
Reporting unit, impairment test, estimated cash flows, discount rate			9.75%					9.75%				9.75%
Maximum \| Vision Care, Surgical and Pharmaceuticals Reporting Units \| Bausch + Lomb
Goodwill [Line Items]
Reporting unit, impairment test, long-term growth rate				3.00%			3.00%		3.00%				3.00%
Reporting unit, impairment test, estimated cash flows, discount rate				11.50%			12.25%		11.50%				12.25%
Maximum \| Salix Reporting Unit
Goodwill [Line Items]
Reporting unit, impairment test, estimated cash flows, discount rate			10.00%					10.00%				10.00%
Uceris Foam
Goodwill [Line Items]
Impairment of intangible assets						$ 37,000,000					37,000,000
Xifaxan Branded Products
Goodwill [Line Items]
Impairment of intangible assets	0		$ 0
Finite-lived intangible assets	$ 2,289,000,000				$ 2,289,000,000						$ 2,289,000,000
Finite lived intangible assets, useful life	51 months				51 months						51 months
Xifaxan Branded Products \| Salix \| Revenue from Contract with Customer, Segment Benchmark \| Product Concentration Risk
Goodwill [Line Items]
Concentration risk percentage											80.00%
Trade Names No Longer Used
Goodwill [Line Items]
Impairment of intangible assets											$ 8,000,000
Discontinued Product Lines
Goodwill [Line Items]
Impairment of intangible assets											$ 9,000,000