RELATED PARTY TRANSACTIONS (Summary of Transactions with SBR) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Related Party Transaction [Line Items]
Revenues	$ 7,465.6	$ 8,726.6	$ 14,522.7	$ 17,363.0
Accounts receivable	1,080.2		1,080.2		$ 1,141.0
Accrued expenses	2,401.9		2,401.9		2,465.3
St. Bernard Renewables LLC
Related Party Transaction [Line Items]
Accounts receivable	40.9		40.9		18.7
Accrued expenses	54.9		54.9		$ 47.8
St. Bernard Renewables LLC | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Related Party Transaction [Line Items]
Revenues	16.9	8.2	30.3	13.2
Purchases from related party	(121.3)	(73.3)	(181.6)	(164.5)
Limited Financial Performance Guarantee of a Term Loan	$ 100.0		$ 100.0
Guarantor Obligations, Maximum Exposure, Percentage	50.00%		50.00%
Equity Method Investment, Ownership Percentage	50.00%		50.00%
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	$ 34.4	31.5	$ 74.4	66.8
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	0.9	1.1	1.9	2.2
St. Bernard Renewables LLC | Equity Method Investment, Nonconsolidated Investee or Group of Investees | General and Administrative Expense | Common asset use and servitude agreement
Related Party Transaction [Line Items]
Total expenses under affiliate agreements	1.8	1.5	4.0	3.5
St. Bernard Renewables LLC | Equity Method Investment, Nonconsolidated Investee or Group of Investees | Cost of Sales [Member] | Lease Agreements
Related Party Transaction [Line Items]
Total expenses under affiliate agreements	$ (2.8)	$ (1.7)	$ (8.1)	$ (1.7)