BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Loss (Income), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposition of business	$ (1.7)
Other Loss (Income), Net
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Foreign currency loss	(1.2)	$ 0.4
Insurance and lease settlement	1.0
Loss on disposition of business			$ (2.7)
Other Loss (Income), Net | Discount Supplements
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Foreign currency loss	$ 0.8
Loss on disposition of business		$ 2.7