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SEGMENT INFORMATION - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 2,027 | $ 2,012
Pharmaceuticals |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 896 | 939
Devices |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 454 | 392
OTC |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 343 | 349
Branded and Other Generics |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 310 | 306
Other revenues |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 24 | 26
Bausch + Lomb |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 881 | 875
Bausch + Lomb | Pharmaceuticals |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 125 | 138
Bausch + Lomb | Devices |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 382 | 341
Bausch + Lomb | OTC |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 316 | 321
Bausch + Lomb | Branded and Other Generics |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 51 | 68
Bausch + Lomb | Other revenues |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 7 | 7
Salix |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 472 | 477
Salix | Pharmaceuticals |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 470 | 477
Salix | Devices |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Salix | OTC |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Salix | Branded and Other Generics |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Salix | Other revenues |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 2 | 0
International Rx |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 306 | 291
International Rx | Pharmaceuticals |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 59 | 66
International Rx | Devices |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
International Rx | OTC |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 25 | 26
International Rx | Branded and Other Generics |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 212 | 188
International Rx | Other revenues |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 10 | 11
Ortho Dermatologics |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 141 | 131
Ortho Dermatologics | Pharmaceuticals |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 65 | 76
Ortho Dermatologics | Devices |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 72 | 51
Ortho Dermatologics | OTC |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Ortho Dermatologics | Branded and Other Generics |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Ortho Dermatologics | Other revenues |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 4 | 4
Diversified Products |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 227 | 238
Diversified Products | Pharmaceuticals |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 177 | 182
Diversified Products | Devices |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 0 | 0
Diversified Products | OTC |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 2 | 2
Diversified Products | Branded and Other Generics |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 47 | 50
Diversified Products | Other revenues |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 1 | $ 4

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