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Quarterly report pursuant to Section 13 or 15(d)

REVENUE (Narrative) (Details)

v3.19.2
REVENUE (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Contract with Customer, Liability, Revenue Recognized Ìý Ìý $ 47.1 Ìý $ 51.3 Ìý Ìý
Take or Pay Contracts [Member] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Contract with Customer, Liability $ 2.7 Ìý 2.7 Ìý 8.2 Ìý Ìý
Not Designated as Hedging Instrument [Member] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 74.8 $ 154.7 80.3 $ 198.5 Ìý Ìý Ìý
Other Current Liabilities [Member] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Contract with Customer, Liability 12.8 Ìý 12.8 Ìý 12.9 Ìý Ìý
Other Liabilities [Member] Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Contract with Customer, Liability, Noncurrent $ 34.3 Ìý $ 34.3 Ìý $ 38.5 $ 47.1 $ 51.4