RELATED PARTY TRANSACTIONS (Summary of Transactions with SBR) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Revenues	$ 8,726.6	$ 9,148.4	$ 17,363.0	$ 18,433.9
Accounts receivable	1,478.6		1,478.6		$ 1,336.1
Accrued expenses	2,770.7		2,770.7		2,968.0
St. Bernard Renewables LLC
Related Party Transaction [Line Items]
Accounts receivable	28.7		28.7		22.1
Accrued expenses	23.1		23.1		$ 28.3
St. Bernard Renewables LLC | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Related Party Transaction [Line Items]
Revenues	8.2	0.0	13.2	0.0
Purchases from related party	(73.3)	0.0	(164.5)	0.0
St. Bernard Renewables LLC | Equity Method Investment, Nonconsolidated Investee or Group of Investees | General and Administrative Expense | Operating Agreement
Related Party Transaction [Line Items]
Total expenses under affiliate agreements	31.5	0.0	66.8	0.0
St. Bernard Renewables LLC | Equity Method Investment, Nonconsolidated Investee or Group of Investees | General and Administrative Expense | Omnibus Agreement
Related Party Transaction [Line Items]
Total expenses under affiliate agreements	1.1	0.0	2.2	0.0
St. Bernard Renewables LLC | Equity Method Investment, Nonconsolidated Investee or Group of Investees | General and Administrative Expense | CAUSA
Related Party Transaction [Line Items]
Total expenses under affiliate agreements	1.5	0.0	3.5	0.0
St. Bernard Renewables LLC | Equity Method Investment, Nonconsolidated Investee or Group of Investees | Cost of products and other | Lease Agreements
Related Party Transaction [Line Items]
Total expenses under affiliate agreements	$ (1.7)	$ 0.0	$ (1.7)	$ 0.0