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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 Ìý Ìý
Contract with Customer, Liability, Revenue Recognized Ìý Ìý 42.8 Ìý $ 51.3 Ìý
Up-front Payment Arrangement [Member] Ìý Ìý Ìý Ìý Ìý Ìý
Contract with Customer, Liability 5.5 Ìý 5.5 Ìý 8.2 Ìý
Not Designated as Hedging Instrument [Member] Ìý Ìý Ìý Ìý Ìý Ìý
Revenues (40.9) 135.9 43.4 334.4 Ìý Ìý
Other Current Liabilities [Member] Ìý Ìý Ìý Ìý Ìý Ìý
Contract with Customer, Liability 12.8 Ìý 12.8 Ìý 12.8 Ìý
Other Noncurrent Liabilities [Member] Ìý Ìý Ìý Ìý Ìý Ìý
Contract with Customer, Liability, Noncurrent $ 30.0 $ 42.8 $ 30.0 $ 42.8 $ 38.5 $ 51.4