DERIVATIVES (Fair Value of Derivative Instruments) (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Designated as Hedging Instrument [Member] \| Inventory Intermediation Agreement Obligation [Member] \| Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Fair Value Asset/(Liability)	$ 3.3	$ 11.3
Not Designated as Hedging Instrument [Member] \| Commodity Contract [Member] \| Accounts Receivable
Derivatives, Fair Value [Line Items]
Fair Value Asset/(Liability)	$ 2.5	$ (3.0)

Fair value of the assets less the liabilities of a derivative or group of derivatives.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

Name:	us-gaap_DerivativeFairValueOfDerivativeNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant