v3.26.3
INVENTORIES (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Inventory [Line Items]          
Crude oil and feedstocks $ 1,601.0   $ 1,601.0   $ 1,438.0
Refined products and blendstocks 1,423.5   1,423.5   1,260.5
Warehouse stock and other 190.6   190.6   177.6
Inventory, Gross 3,215.1   3,215.1   2,876.1
Lower of cost or market adjustment 0.0   0.0   (313.0)
Total inventories 3,215.1   3,215.1   2,563.1
Excess of replacement or current costs over stated LIFO value 1,600.0   1,600.0    
Income (loss) from operations $ (2,100.9) $ (285.9) (3,672.6) $ 182.3  
Pre-tax charge related to a LIFO layer decrement         $ 5.4
Scenario, Adjustment          
Inventory [Line Items]          
Income (loss) from operations     $ 313.0