DERIVATIVE FINANCIAL INSTRUMENTS (Details 2) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Derivatives, Fair Value [Line Items]
Asset derivatives	$ (38.5)	$ (31.4)	$ (3.3)
Liability derivatives	(3.2)	(0.7)	(44.5)
Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(28.9)	(24.2)	(3.2)
Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(9.6)	(7.2)	(0.1)
Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(3.0)	(0.1)	(38.3)
Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(0.2)	(0.6)	(6.2)
Commodity Contracts Losses | Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	1.1	3.1	0.0
Commodity Contracts Losses | Designated as Hedging Instrument | Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	0.1	0.2	0.0
Commodity Contracts Losses | Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(0.3)	(1.4)	(36.0)
Commodity Contracts Losses | Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	(0.3)	(0.8)	(6.6)
Commodity Contracts Gains | Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(29.6)	(25.0)	0.0
Commodity Contracts Gains | Designated as Hedging Instrument | Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(9.7)	(7.4)	(0.1)
Commodity Contracts Gains | Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	0.0	1.3	1.0
Commodity Contracts Gains | Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	0.1	0.2	0.4
Foreign Exchange Contract | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	(0.6)	(2.5)	(3.3)
Foreign Exchange Contract | Not Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	0.7	0.0	1.5
Foreign Exchange Contract Loss | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	0.2	0.2	0.1
Foreign Exchange Contract Loss | Not Designated as Hedging Instrument | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	$ (3.4)	$ 0.0	$ (4.8)