FAIR VALUE MEASUREMENTS (Measured on Recurring Basis) (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Commodity Contract
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ 83.5	$ 9.0
Derivative, Collateral, Right to Reclaim Cash	(71.5)	(6.0)
Derivative Liability	12.0	3.0
Catalyst financing obligations [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative, Collateral, Right to Reclaim Cash	0.0	0.0
Obligations, Fair Value Disclosure	58.4	102.5
Renewable Energy Credit and Emissions Obligation
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative, Collateral, Right to Reclaim Cash	0.0
Obligations, Fair Value Disclosure	953.9	528.1
Contingent Consideration [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative, Collateral, Right to Reclaim Cash	0.0	0.0
Obligations, Fair Value Disclosure	32.3	12.1
Level 1 [Member] | Commodity Contract
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	79.7	2.3
Level 1 [Member] | Catalyst financing obligations [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Obligations, Fair Value Disclosure	0.0	0.0
Level 1 [Member] | Renewable Energy Credit and Emissions Obligation
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Obligations, Fair Value Disclosure	0.0	0.0
Level 1 [Member] | Contingent Consideration [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Obligations, Fair Value Disclosure	0.0	0.0
Level 2 [Member] | Commodity Contract
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	3.8	6.7
Level 2 [Member] | Catalyst financing obligations [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Obligations, Fair Value Disclosure	58.4	102.5
Level 2 [Member] | Renewable Energy Credit and Emissions Obligation
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Obligations, Fair Value Disclosure	953.9	528.1
Level 2 [Member] | Contingent Consideration [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Obligations, Fair Value Disclosure	0.0	0.0
Level 3 [Member] | Commodity Contract
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	0.0	0.0
Level 3 [Member] | Catalyst financing obligations [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Obligations, Fair Value Disclosure	0.0	0.0
Level 3 [Member] | Renewable Energy Credit and Emissions Obligation
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Obligations, Fair Value Disclosure	0.0	0.0
Level 3 [Member] | Contingent Consideration [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Obligations, Fair Value Disclosure	32.3	12.1
Money market funds [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	270.1	411.6
Money market funds [Member] | Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	270.1	411.6
Money market funds [Member] | Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0.0	0.0
Money market funds [Member] | Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0.0	0.0
Commodity Contract
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	71.5	6.0
Derivative, Collateral, Obligation to Return Cash	(71.5)	(6.0)
Derivative Asset	0.0	0.0
Commodity Contract | Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	71.5	2.5
Commodity Contract | Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0.0	3.5
Commodity Contract | Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0.0	0.0
Inventory Intermediation Agreement Obligation [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	19.7	11.3
Derivative, Collateral, Obligation to Return Cash	0.0	0.0
Derivative Asset	19.7	11.3
Inventory Intermediation Agreement Obligation [Member] | Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	0.0	0.0
Inventory Intermediation Agreement Obligation [Member] | Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	19.7	11.3
Inventory Intermediation Agreement Obligation [Member] | Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	$ 0.0	$ 0.0