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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Jan. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 01, 2017
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Increase to goodwill |  |  |  |  |  | $ 458.6 |  |
Amortization expense related to other intangible assets |  |  |  |  | $ 2.5 | 7.8 | $ 7.6 |
Developed Technology and In-process Research and Development |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  | 116.2 |  |  |
Harpoon Medical |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Increase to goodwill |  | $ 142.1 |  |  |  |  |  |
Increase to intangible assets |  | $ 53.1 |  |  |  | $ 53.1 |  | $ 53.1
Valtech |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Increase to goodwill |  |  | $ 316.5 |  |  |  |  |
Valtech | Developed Technology and In-process Research and Development |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Impairment of intangible assets | $ 116.2 |  |  | $ 116.2 | $ 116.2 |  |  |
Valtech | Developed technology |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Increase to intangible assets |  |  | 109.2 |  |  |  |  |
Valtech | IPR&D |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Increase to intangible assets |  |  | $ 87.9 |  |  |  |  |

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