FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Impairment of goodwill	$ 10.5
Fair value of goodwill	2,663.4	$ 2,691.4
Corporate Items and Eliminations
Segment Reporting Information [Line Items]
Impairment of goodwill	10.5
Fair value of goodwill	$ 0.0

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Fair value portion of asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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