v3.26.1
INVENTORIES (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Inventory [Line Items]          
Crude oil and feedstocks $ 1,397.1   $ 1,397.1   $ 1,438.0
Refined products and blendstocks 1,309.0   1,309.0   1,260.5
Warehouse stock and other 187.8   187.8   177.6
Inventory, Gross 2,893.9   2,893.9   2,876.1
Lower of cost or market adjustment 0.0   0.0   (313.0)
Total inventories 2,893.9   2,893.9   2,563.1
Excess of replacement or current costs over stated LIFO value 651.3   651.3    
Income (loss) from operations $ (1,272.1) $ (43.0) (1,571.7) $ 468.2  
Pre-tax charge related to a LIFO layer decrement         $ 5.4
Scenario, Adjustment          
Inventory [Line Items]          
Income (loss) from operations     $ 313.0