v3.26.1
INVENTORIES (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Inventory [Line Items]      
Refined products and blendstocks $ 1,311.7   $ 1,260.5
Crude oil and feedstocks 1,587.5   1,438.0
Warehouse stock and other 179.0   177.6
Inventory, Gross 3,078.2   2,876.1
Lower of cost or market adjustment 0.0   (313.0)
Total inventories 3,078.2   2,563.1
Excess of replacement or current costs over stated LIFO value 1,600.0    
Income (loss) from operations (299.6) $ 511.2  
Inventory, LIFO Reserve, Effect on Income, Net     $ 5.4
Scenario, Adjustment      
Inventory [Line Items]      
Income (loss) from operations $ 313.0