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INTANGIBLE ASSETS AND GOODWILL - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Goodwill [Line Items] |  |  |  |  |
Asset impairments | $ 1,000,000 | $ 0 | $ 1,000,000 | $ 6,000,000 |
Finite-lived intangible assets | 3,032,000,000 |  | 3,032,000,000 |  | $ 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 | $ 1,212,000,000 |  | $ 1,212,000,000 |  |
Finite lived intangible assets, useful life | 27 months |  | 27 months |  |

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