FAIR VALUE MEASUREMENTS - Changes to Contingent Consideration (Detail) - Contingent Consideration Liability - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Business Combination, Contingent Consideration, Liability [Roll Forward]
Contingent consideration, Beginning Balance	$ 24.1	$ 25.4
Increase due to current year acquisitions	0.1	1.0
Purchase accounting adjustments	(9.6)
Decrease due to payments	(1.5)	(3.0)
Changes due to foreign currency fluctuations		2.8
Change in fair value reflected in Selling, general, and administrative expenses	(0.4)	(2.1)
Other	(0.3)
Contingent consideration, Ending Balance	$ 12.4	$ 24.1