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