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INTANGIBLE ASSETS AND GOODWILL - Narrative (Details) |  |  |  | 2 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
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 |  |  |

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