Quarterly report pursuant to Section 13 or 15(d)

REVENUE (Narrative) (Details)

v3.19.3
REVENUE (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Revenues $ 555.6 $ 741.8 $ 1,455.8 $ 1,636.1    
Contract with Customer, Liability, Revenue Recognized     42.8   $ 51.3  
Up-front Payment Arrangement [Member]            
Contract with Customer, Liability 5.5   5.5   8.2  
Not Designated as Hedging Instrument [Member]            
Revenues (40.9) 135.9 43.4 334.4    
Other Current Liabilities [Member]            
Contract with Customer, Liability 12.8   12.8   12.8  
Other Noncurrent Liabilities [Member]            
Contract with Customer, Liability, Noncurrent $ 30.0 $ 42.8 $ 30.0 $ 42.8 $ 38.5 $ 51.4