REVENUES (Schedule of Revenue from External Customers) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Product Information [Line Items]
Revenues	$ 33,077.9	$ 38,288.5	$ 46,780.6
Deferred revenue	43.3	63.6
Gasoline and distillates
Product Information [Line Items]
Revenues	28,652.0	34,002.5	41,465.0
Asphalt and blackoils
Product Information [Line Items]
Revenues	1,940.1	1,650.1	2,123.8
Feedstocks and other
Product Information [Line Items]
Revenues	1,449.1	1,640.6	1,863.0
Chemicals
Product Information [Line Items]
Revenues	662.8	650.6	903.8
Lubricants
Product Information [Line Items]
Revenues	$ 373.9	$ 344.7	$ 425.0