INVENTORIES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Inventory [Line Items]
Crude oil and feedstocks	$ 1,409.1		$ 1,104.9
Refined products and blendstocks	1,341.0		1,258.4
Warehouse stock and other	143.4		141.8
Inventory, Gross	2,893.5		2,505.1
Lower of cost or market adjustment	0.0		0.0
Total inventories	2,893.5		2,505.1
Income (Loss) from Operations	44.8	$ 10.1
Scenario, Adjustment [Member]
Inventory [Line Items]
Lower of cost or market adjustment	0.0	(264.0)	0.0	$ (669.6)
Income (Loss) from Operations		$ 405.6
Titled Inventory
Inventory [Line Items]
Crude oil and feedstocks	1,198.2		953.5
Refined products and blendstocks	1,030.3		964.6
Warehouse stock and other	143.4		141.8
Inventory, Gross	2,371.9		2,059.9
Lower of cost or market adjustment	0.0		0.0
Total inventories	2,371.9		2,059.9
Inventory Intermediation Agreement
Inventory [Line Items]
Crude oil and feedstocks	210.9		151.4
Refined products and blendstocks	310.7		293.8
Warehouse stock and other	0.0		0.0
Inventory, Gross	521.6		445.2
Lower of cost or market adjustment	0.0		0.0
Total inventories	$ 521.6		$ 445.2