INVENTORIES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Inventory [Line Items]
Crude oil and feedstocks	$ 1,213.7		$ 1,213.7		$ 1,104.9
Refined products and blendstocks	1,329.0		1,329.0		1,258.4
Warehouse stock and other	146.8		146.8		141.8
Inventory, Gross	2,689.5		2,689.5		2,505.1
Lower of cost or market adjustment	0.0		0.0		0.0
Total inventories	2,689.5		2,689.5		2,505.1
Income from operations	1,356.2	$ 54.3	3,058.9	$ 165.1
Scenario, Adjustment
Inventory [Line Items]
Lower of cost or market adjustment	0.0	$ 0.0	0.0	0.0	0.0	$ (669.6)
Income from operations				$ 669.6
Titled Inventory
Inventory [Line Items]
Crude oil and feedstocks	1,069.3		1,069.3		953.5
Refined products and blendstocks	1,089.3		1,089.3		964.6
Warehouse stock and other	146.8		146.8		141.8
Inventory, Gross	2,305.4		2,305.4		2,059.9
Lower of cost or market adjustment	0.0		0.0		0.0
Total inventories	2,305.4		2,305.4		2,059.9
Inventory Intermediation Agreement
Inventory [Line Items]
Crude oil and feedstocks	144.4		144.4		151.4
Refined products and blendstocks	239.7		239.7		293.8
Warehouse stock and other	0.0		0.0		0.0
Inventory, Gross	384.1		384.1		445.2
Lower of cost or market adjustment	0.0		0.0		0.0
Total inventories	$ 384.1		$ 384.1		$ 445.2