DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) segment	Sep. 30, 2018 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Description of Business [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	$ 32.6	$ 43.8	$ 31.8	$ 43.1
Number of reportable segments | segment			1
Operating Lease, Right-of-Use Asset	1,011.0		$ 1,011.0		$ 853.9
Operating Lease, Liability	$ 996.1		$ 996.1		853.9
PBF Energy [Member] | Class A Common Stock [Member]
Description of Business [Line Items]
Percentage of ownership in PBF LLC	99.00%		99.00%
Lease with Affiliate [Member]
Description of Business [Line Items]
Operating Lease, Right-of-Use Asset	$ 666.2		$ 666.2		604.4	$ 0.0
Operating Lease, Liability					$ 604.4
Torrance Refinery [Member] | Land [Member]
Description of Business [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	$ 33.1