REVENUES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Total Revenues	$ 8,726.6	$ 9,148.4	$ 17,363.0	$ 18,433.9
Deferred revenue	20.5		20.5		$ 63.6
Gasoline and distillates
Total Revenues	7,442.9	8,142.1	15,041.9	16,374.7
Asphalt and blackoils
Total Revenues	667.4	385.0	1,141.0	788.2
Feedstocks and other
Total Revenues	375.9	349.8	683.8	767.6
Chemicals
Total Revenues	152.7	174.2	319.7	314.4
Lubricants
Total Revenues	$ 87.7	$ 97.3	$ 176.6	$ 189.0