v3.25.4
DERIVATIVES (Gain (Loss) Recognized in Income) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Designated as Hedging Instrument | Inventory Intermediation Agreement Obligation      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain or (Loss) Recognized in Income on Derivatives $ 0.0 $ 0.0 $ 21.0
Designated as Hedging Instrument | Intermediates and Refined Products Inventory | Fair Value Hedging      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain or (Loss) Recognized in Income on Derivatives 0.0 0.0 (21.0)
Not Designated as Hedging Instrument | Commodity contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain or (Loss) Recognized in Income on Derivatives $ 0.7 $ 12.3 $ 38.1