EXIT AND RESTRUCTURING ACTIVITIES - Reserve Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Lease Termination [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 0.6	$ 0.0
Charges	0.0	0.6
Cash expenditures	(0.5)	0.0
Restructuring reserve, ending balance	0.1	0.6
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	2.3	0.0
Charges	0.0	3.0
Cash expenditures	(2.3)	(0.7)
Restructuring reserve, ending balance	$ 0.0	$ 2.3