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FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Feb. 25, 2019
--- | --- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Contingent consideration | $ 218.1 | $ 291.8 |
General Electric Company |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Contingent consideration |  |  | $ 440.0
Other Accrued Liabilities | General Electric Company | Level 3 |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Contingent consideration | $ 130.0 |  |

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