Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Deferred Revenue) (Details)

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 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]    
Realization of deferred revenue $ 34.6 $ 0.0
Other Noncurrent Liabilities [Member]    
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]    
Contract with Customer, Liability, Noncurrent 25.7 38.5
Contract With Customer, Liability, Period Increase (Decrease) (25.7) 0.0
Contract with Customer, Liability, Noncurrent 0.0 38.5
Other Current Liabilities [Member]    
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]    
Contract with Customer, Liability, Current 22.1 21.0
Contract With Customer, Liability, Period Increase (Decrease) (21.8) (2.9)
Contract with Customer, Liability, Current $ 0.3 $ 18.1