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INTANGIBLE ASSETS AND GOODWILL - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Goodwill [Line Items]
Asset impairments	$ 0	$ 5,000,000	$ 0	$ 6,000,000
Finite-lived intangible assets	3,249,000,000		3,249,000,000		$ 3,753,000,000
Accumulated goodwill impairment charges	$ 5,497,000,000		$ 5,497,000,000
Vision Care, Pharmaceuticals, And Surgical
Goodwill [Line Items]
Fair value of reporting value, greater than its carrying value	25.00%		25.00%
Goodwill, impairment loss			$ 0
Maximum | Vision Care, Pharmaceuticals, And Surgical
Goodwill [Line Items]
Reporting unit, impairment test, long-term growth rate	3.00%		3.00%
Reporting unit, impairment test, estimated cash flows, discount rate	11.50%		11.50%
Minimum | Vision Care, Pharmaceuticals, And Surgical
Goodwill [Line Items]
Reporting unit, impairment test, estimated cash flows, discount rate	10.00%		10.00%
Xifaxan Branded Products
Goodwill [Line Items]
Finite-lived intangible assets	$ 1,347,000,000		$ 1,347,000,000
Finite lived intangible assets, useful life	30 months		30 months

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