NET INCOME PER SHARE OF PBF ENERGY (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended		12 Months Ended
		Jan. 01, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Statutory tax rate		21.00%			26.40%		35.00%
Basic Earnings Per Share:
Net income attributable to PBF Energy			$ 272,153	$ (109,663)	$ 302,519	$ (140,740)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic			$ 197	$ 269	$ 398	$ 539
Denominator for basic net income per Class A common share-weighted average shares (in shares)			112,875,813	108,779,992	111,853,774	108,770,237
Basic net income attributable to PBF Energy per Class A common share (in usd per share)			$ 2.41	$ (1.01)	$ 2.70	$ (1.30)
Net Income (Loss) Available to Common Stockholders, Basic			$ 271,956	$ (109,932)	$ 302,121	$ (141,279)
Diluted Earnings Per Share:
Plus: Net income attributable to noncontrolling interest			6,108	0	7,396	0
Less: Income tax on net income attributable to noncontrolling interest	[1]		(1,613)	0	(1,953)	0
Numerator for diluted net income per Class A common share	[1]		$ 276,451	$ (109,932)	$ 307,564	$ (141,279)
Denominator for basic net income per Class A common share-weighted average shares (in shares)			112,875,813	108,779,992	111,853,774	108,770,237
Effect of dilutive securities:
Conversion of PBF LLC Series A Units	[1]		1,838,196	0	2,681,980	0
Effect of dilutive securities on common stock equivalents (in shares)	[2]		1,695,264	0	1,214,173	0
Denominator for diluted net income (loss) per Class A common share-adjusted weighted average shares			116,409,273	108,779,992	115,749,927	108,770,237
Diluted net income attributable to PBF Energy per Class A common share (in usd per share)			$ 2.37	$ (1.01)	$ 2.66	$ (1.30)
Series A Units [Member]
Effect of dilutive securities:
Antidilutive common stock excluded from computation of dilutive earnings per share (in shares)				3,828,871		3,835,999
Stock Options [Member]
Effect of dilutive securities:
Antidilutive common stock excluded from computation of dilutive earnings per share (in shares)			12,500	7,278,142	233,250	7,278,142

[1] (1)The diluted earnings per share calculation generally assumes the conversion of all outstanding PBF LLC Series A Units to Class A common stock of PBF Energy. For the three and six months ended June 30, 2018, respectively, the net income attributable to PBF Energy, used in the numerator of the diluted earnings per share calculation is adjusted to reflect the net income, as well as the corresponding income tax expense (based on a 26.4% estimated annualized statutory corporate tax rate) attributable to the converted units.The potential conversion of 3,828,871 and 3,835,999 PBF LLC Series A Units for the three and six months ended June 30, 2017, respectively, were excluded from the denominator in computing diluted net income per share because including them would have had an antidilutive effect. As the PBF LLC Series A Units were not included, the numerator used in the calculation of diluted net income per share was equal to the numerator used in the calculation of basic net income per share and does not include the net income and related income tax expense associated with the potential conversion of the PBF LLC Series A Units

[2] Represents an adjustment to weighted-average diluted shares outstanding to assume the full exchange of common stock equivalents, including options and warrants for PBF LLC Series A Units and options for shares of PBF Energy Class A common stock as calculated under the treasury stock method (to the extent the impact of such exchange would not be anti-dilutive). Common stock equivalents exclude the effects of options and warrants to purchase 12,500 and 233,250 shares of PBF Energy Class A common stock and PBF LLC Series A units because they are anti-dilutive for the three and six months ended June 30, 2018, respectively. Common stock equivalents exclude the effects of options and warrants to purchase 7,278,142 and 7,278,142 shares of PBF Energy Class A common stock and PBF LLC Series A units because they are anti-dilutive for the three and six months ended June 30, 2017, respectively.