RELATED PARTY TRANSACTIONS (Summary of Transactions with SBR) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Related Party Transaction [Line Items]
Revenues	$ 7,057.1	$ 8,636.4
Accounts receivable	1,133.2		$ 1,141.0
Accrued expenses	2,574.7		2,465.3
St. Bernard Renewables LLC
Related Party Transaction [Line Items]
Accounts receivable	53.7		18.7
Accrued expenses			$ 47.8
St. Bernard Renewables LLC | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Related Party Transaction [Line Items]
Revenues	13.4	5.0
Purchases from related party	(60.3)	(91.2)
Accrued expenses	37.0
Limited Financial Performance Guarantee of a Term Loan	$ 100.0
Guarantor Obligations, Maximum Exposure, Percentage	50.00%
Equity Method Investment, Ownership Percentage	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	$ 40.0	35.3
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	1.0	1.1
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	2.2	2.0
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	$ (5.3)	$ 0.0