REVENUES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Revenues	$ 2,515.8	$ 6,560.0	$ 7,793.3	$ 11,776.2
Deferred revenue	20.5		20.5		$ 20.1
Refining Group [Member]
Revenues	2,499.1	6,551.9	7,759.1	11,760.6
PBF Logistics LP [Member]
Revenues	89.2	82.8	182.2	161.6
Prior to elimination [Member]
Revenues	2,588.3	6,634.7	7,941.3	11,922.2
Intersegment Eliminations [Member]
Revenues	(72.5)	(74.7)	(148.0)	(146.0)
Gasoline And Distillate [Member] | Refining Group [Member]
Revenues	2,035.9	5,570.7	6,606.3	10,003.7
Asphalt and Residual Oil [Member] | Refining Group [Member]
Revenues	164.1	531.8	371.1	884.8
Other Refining and Marketing [Member] | Refining Group [Member]
Revenues	215.3	203.9	526.6	404.6
Chemicals [Member] | Refining Group [Member]
Revenues	45.5	177.6	158.3	329.3
Lubricants [Member] | Refining Group [Member]
Revenues	$ 38.3	$ 67.9	$ 96.8	$ 138.2