FAIR VALUE MEASUREMENTS - Schedule of Contingent Consideration Liabilities Recorded Using Level 3 Inputs, Total and Amounts Recorded as Current Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Other liabilities (see Note 7)	$ 7.5	$ 7.8
Level 3 Inputs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Other current liabilities	2.8	4.6
Other liabilities (see Note 7)	7.5	7.8
Total contingent consideration	$ 10.3	$ 12.4