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INTANGIBLE ASSETS AND GOODWILL - Narrative (Details) |  |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended |
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Oct. 01, 2021 USD ($) | Jun. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Oct. 01, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Oct. 01, 2019 USD ($) | Mar. 31, 2022 USD ($) reporting_unit segment | Dec. 31, 2020 USD ($) | Sep. 30, 2020 | Jun. 30, 2020 | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill impairments |  | $ 0 | $ 0 |  |  |  | $ 0 |  |  |  |  | $ 469,000,000 |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  | 8,434,000,000 | $ 8,027,000,000 | $ 8,601,000,000 |
Revenue, year-over-year increase |  |  |  |  |  |  |  |  |  |  |  | 407,000,000 |  |  |
Revenue, year-over-year decrease, percentage |  |  |  |  |  |  |  |  | 1.00% | 3.00% | 23.00% |  |  |  |
Percentage of fair value in excess of carrying value |  | 45.00% | 40.00% |  |  |  |  |  |  |  |  |  |  |  |
Accumulated goodwill impairment charges to date |  |  |  |  |  |  |  |  |  |  |  | 4,180,000,000 |  |  |
Goodwill |  |  |  |  |  |  |  |  | $ 13,044,000,000 |  |  | 12,457,000,000 | 13,044,000,000 | 13,126,000,000 | $ 13,142,000,000
Bausch + Lomb |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  | 3,765,000,000 | 3,415,000,000 | 3,778,000,000 |
Goodwill |  |  |  |  |  |  |  |  |  |  |  | 5,318,000,000 |  |  |
Salix |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  | 2,074,000,000 | 1,904,000,000 | 2,022,000,000 |
Goodwill |  |  |  |  |  |  |  |  | 3,159,000,000 |  |  | 3,159,000,000 | 3,159,000,000 | 3,159,000,000 | 3,156,000,000
International |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  | 1,166,000,000 | 1,181,000,000 | 1,154,000,000 |
Goodwill |  |  |  |  |  |  |  |  |  |  |  | 825,000,000 |  |  |
Solta Medical |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  | 308,000,000 | 253,000,000 | 194,000,000 |
Diversified Products |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  | 1,121,000,000 | 1,274,000,000 | 1,453,000,000 |
Goodwill |  |  |  |  |  |  |  |  | 2,914,000,000 |  |  | 2,357,000,000 | 2,914,000,000 | 2,914,000,000 | $ 2,914,000,000
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  | 5 |  |  |  |  |  |  |
Number of reporting units | reporting_unit |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Subsequent Event | Bausch + Lomb |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | $ 5,318,000,000 |  |  |  |  |  |  |
Subsequent Event | Salix |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | 3,159,000,000 |  |  |  |  |  |  |
Subsequent Event | International |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | 825,000,000 |  |  |  |  |  |  |
Subsequent Event | Solta Medical |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | 115,000,000 |  |  |  |  |  |  |
Subsequent Event | Diversified Products |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | $ 3,040,000,000 |  |  |  |  |  |  |
Ortho Dermatologics Reporting Unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill impairments | $ 0 |  | $ 469,000,000 | $ 0 | $ 0 | $ 0 |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, long-term growth rates | 1.00% |  | 1.00% | 2.00% |  |  |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, estimated cash flows, discount rate | 9.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of fair value in excess of carrying value | 10.00% |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |
Reporting Units Excluding Ortho Dermatologics |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill impairments |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, long-term growth rates |  | 2.00% | 1.00% |  |  |  |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, estimated cash flows, discount rate |  | 7.00% | 11.00% |  |  |  |  |  |  |  |  |  |  |  |
Minimum | Ortho Dermatologics Reporting Unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, estimated cash flows, discount rate |  |  | 9.00% | 9.50% |  |  |  |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, long-term growth rates |  | 3.00% | 3.00% |  |  |  |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, estimated cash flows, discount rate |  | 10.00% | 12.25% |  |  |  |  |  |  |  |  |  |  |  |
Maximum | Ortho Dermatologics Reporting Unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reporting unit, impairment test, estimated cash flows, discount rate |  |  | 10.00% | 9.75% |  |  |  |  |  |  |  |  |  |  |
Acquired IPR&D |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of indefinite-lived intangible assets |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 | 4,000,000 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Amoun Pharmaceutical Company S.A.E |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  |  |  |  |  |  |  |  | 88,000,000 |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  | 26,000,000 |  |  |
Held For Sale | Amoun Pharmaceutical Company S.A.E |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  | $ 96,000,000 |  |  |  |  |  |
Held For Sale | A Certain International Business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  | 96,000,000 |  |
Held For Sale | Certain Products For Disposal, September 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,000,000 |
Product brands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  |  |  |  |  |  |  |  | 105,000,000 | 16,000,000 | 58,000,000 |
Discontinued Product Lines |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  |  |  |  |  |  |  |  | 23,000,000 | $ 1,000,000 |  |
Product rights/patents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000,000 |
Unutilized IT Infrastructure Improvement Project |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  |  |  |  |  |  |  |  | $ 18,000,000 |  |  |

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