FAIR VALUE MEASUREMENTS - Changes to Contingent Consideration (Detail) - Contingent Consideration Liability - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Business Combination, Contingent Consideration, Liability [Roll Forward]
Contingent consideration, Beginning Balance	$ 12.4	$ 24.1
Increase due to current year acquisitions		0.1
Purchase accounting adjustments	(0.4)	(9.6)
Decrease due to payments	(1.3)	(1.5)
Change in fair value reflected in SG&A	0.2	(0.4)
Other		(0.3)
Foreign exchange fluctuations	(0.6)
Contingent consideration, Ending Balance	$ 10.3	$ 12.4