Quarterly report pursuant to Section 13 or 15(d)

REVENUE (Deferred Revenue) (Details)

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9 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Deferred Revenue Arrangement [Line Items]    
Deferred revenue, current $ 16.1 $ 23.8
Deferred revenue, noncurrent 42.8 $ 51.4
Other Current Liabilities [Member]    
Deferred Revenue Arrangement [Line Items]    
Deferred Revenue, Period Increase (Decrease) (7.7)  
Other Noncurrent Liabilities [Member]    
Deferred Revenue Arrangement [Line Items]    
Deferred Revenue, Period Increase (Decrease) $ (8.6)