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QUARTERLY CONSOLIDATED FINANCIAL INFORMATION (UNAUDITED) - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |
Acquisition and integration expenses | $ 135.3 | $ 100.8 | $ 14.2 | $ 5.3 | $ 21.5 | $ 8.2 | $ 8.1 | $ 18.3 |
Increase (decrease) in estimated transition tax liability |  | $ (23.3) |  |  |  |  |  |  | $ (40.4)

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- Definition Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs. + References No definition available. + Details
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