BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Schedule of Deferred Revenue (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018	Dec. 31, 2016
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred Revenue (Current)	$ 21,000,000	$ 22,400,000	$ 23,800,000	$ 16,200,000
Deferred Revenue (Long-Term)	38,500,000	51,400,000		$ 64,300,000
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Customer Supplemental Payments [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred Revenue (Current)		1.4
Other Current Liabilities [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Increase (Decrease)	(2,800,000)	6,200,000
Other Noncurrent Liabilities [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Increase (Decrease)	$ (12,900,000)	$ (12,900,000)