EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income	$ 41.7	$ 20.9
Basic shares	165.0	167.2
Basic net income per share	$ 0.25	$ 0.13
Earnings Per Share, Diluted [Abstract]
Basic shares	165.0	167.2
Stock-based compensation	1.1	2.0
Diluted shares	166.1	169.2
Diluted net income per share	$ 0.25	$ 0.12
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	5.6	2.5