DERIVATIVE FINANCIAL INSTRUMENTS (Details 2) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Derivatives, Fair Value [Line Items]
Asset derivatives	$ (59.1)	$ (31.4)	$ (7.0)
Liability derivatives	(6.1)	(0.7)	(7.7)
Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(44.2)	(24.2)	(4.7)
Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(14.9)	(7.2)	(2.3)
Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(6.1)	(0.1)	(7.6)
Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	0.0	(0.6)	(0.1)
Commodity Contracts Gains | Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(45.5)	(25.0)	(5.1)
Commodity Contracts Gains | Designated as Hedging Instrument | Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(14.9)	(7.4)	(3.0)
Commodity Contracts Gains | Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	0.7	1.3	2.4
Commodity Contracts Gains | Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	0.0	0.2	0.1
Commodity Contracts Losses | Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	1.3	3.1	2.8
Commodity Contracts Losses | Designated as Hedging Instrument | Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	0.0	0.2	0.7
Commodity Contracts Losses | Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(0.7)	(1.4)	(8.8)
Commodity Contracts Losses | Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	0.0	(0.8)	(0.2)
Foreign Exchange Contract | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	0.0	(2.5)	(5.3)
Foreign Exchange Contract | Not Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	0.4	0.0	0.1
Foreign Exchange Contract Loss | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	0.0	0.2	2.9
Foreign Exchange Contract Loss | Not Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	$ (6.5)	$ 0.0	$ (1.3)