RELATED PARTY TRANSACTIONS (Summary of Related Party Transactions) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Sales	$ 29,332.3	$ 33,115.3	$ 38,324.8
St. Bernard Renewables LLC \| Equity Method Investment, Nonconsolidated Investee or Group of Investees
Related Party Transaction [Line Items]
Sales	55.8	39.7	9.1
Purchases	(430.7)	(323.5)	(244.4)
St. Bernard Renewables LLC \| Operating Agreement \| General and Administrative Expense \| Equity Method Investment, Nonconsolidated Investee or Group of Investees
Related Party Transaction [Line Items]
Total lease expense under related party agreements	136.2	163.7	62.8
St. Bernard Renewables LLC \| Omnibus Agreement \| General and Administrative Expense \| Equity Method Investment, Nonconsolidated Investee or Group of Investees
Related Party Transaction [Line Items]
Total lease expense under related party agreements	4.0	4.1	0.0
St. Bernard Renewables LLC \| Common Asset Use and Servitude Agreement \| General and Administrative Expense \| Equity Method Investment, Nonconsolidated Investee or Group of Investees
Related Party Transaction [Line Items]
Total lease expense under related party agreements	7.7	6.6	0.0
St. Bernard Renewables LLC \| Lease Agreements \| Cost of Sales \| Equity Method Investment, Nonconsolidated Investee or Group of Investees
Related Party Transaction [Line Items]
Total lease expense under related party agreements	$ (8.1)	$ (4.1)	$ 0.0

Amount of transactions with related party during the financial reporting period.

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