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INTANGIBLE ASSETS AND GOODWILL - Narrative (Details) - USD ($) |  |  |  |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2021 | Mar. 31, 2021 | Oct. 01, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  |  |  |  |  |  | $ 213,000,000 | $ 17,000,000
Revenues |  |  |  |  |  | $ 2,111,000,000 |  | $ 2,138,000,000 |  | 6,238,000,000 | 5,814,000,000
Revenue, year-over-year increase (decrease) |  |  |  |  |  |  |  |  |  | 424,000,000 |
Revenue, year-over-year decrease, percentage |  |  |  |  |  |  | 1.00% | 3.00% | 23.00% |  |
Goodwill impairment | $ 0 | $ 0 |  |  |  |  |  |  |  | 469,000,000 |
Fair value of reporting value, greater than its carrying value | 45.00% | 40.00% |  |  |  |  |  |  |  |  |
Accumulated goodwill impairment charges |  |  |  |  |  | $ 4,180,000,000 |  |  |  | 4,180,000,000 |
Ortho Dermatologics Reporting Unit |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill impairment |  | $ 469,000,000 | $ 0 | $ 0 | $ 0 |  |  |  |  |  |
Reporting unit, impairment test, long-term growth rate |  | 1.00% | 2.00% |  |  |  |  |  |  |  |
Fair value of reporting value, greater than its carrying value |  |  | 10.00% |  |  |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, long-term growth rate | 2.00% | 1.00% |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, estimated cash flows, discount rate | 7.00% | 11.00% |  |  |  |  |  |  |  |  |
Minimum | Ortho Dermatologics Reporting Unit |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, estimated cash flows, discount rate |  | 9.00% | 9.50% |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, long-term growth rate | 3.00% | 3.00% |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, estimated cash flows, discount rate | 10.00% | 12.25% |  |  |  |  |  |  |  |  |
Maximum | Ortho Dermatologics Reporting Unit |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, estimated cash flows, discount rate |  | 10.00% | 9.75% |  |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Amoun |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  |  |  |  |  |  | 88,000,000 |
Product brands |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  |  |  |  |  |  | 105,000,000 | 16,000,000
Discontinued Product Lines |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  |  |  |  |  |  | $ 20,000,000 | $ 1,000,000

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