NET INCOME PER SHARE OF PBF ENERGY (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic										$ 0.5	$ 0.7	$ 1.0
Effective tax rate										24.90%	26.00%	39.60%
Net Income (Loss) Available to Common Stockholders, Basic										$ 318.9	$ 127.6	$ 414.6
Basic Earnings Per Share:
Numerator for basic net income per Class A common share-net income attributable to PBF Energy		$ 53.0	$ 69.4	$ (32.2)	$ 229.2	$ (353.8)	$ 179.6	$ 272.1	$ 30.4	$ 319.4	$ 128.3	$ 415.6
Denominator for basic net income per Class A common share-weighted average shares (in shares)	[1]									119,887,646	115,190,262	109,779,407
Basic net income attributable to PBF Energy per Class A common share (in usd per share)										$ 2.66	$ 1.11	$ 3.78
Diluted Earnings Per Share:
Net income attributable to PBF Energy		$ 53.0	$ 69.4	$ (32.2)	$ 229.2	$ (353.8)	$ 179.6	$ 272.1	$ 30.4	$ 319.4	$ 128.3	$ 415.6
Plus: Net income attributable to noncontrolling interest	[1]									4.3	4.6	16.7
Less: Income tax on net income per Class A common share	[1]									(1.0)	(1.2)	(6.6)
Numerator for diluted net income per Class A common share	[1]									$ 322.2	$ 131.0	$ 424.7
Denominator for basic net income per Class A common share-weighted average shares (in shares)	[1]									119,887,646	115,190,262	109,779,407
Effect of dilutive securities:
Conversion of PBF LLC Series A Units	[1]									1,207,581	1,938,089	3,823,783
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants	[1],[2]									758,072	1,645,255	295,655
Denominator for diluted net income per common share-adjusted weighted average shares (in shares)										121,853,299	118,773,606	113,898,845
Diluted net income attributable to PBF Energy per Class A common share (in usd per share)		$ 0.44	$ 0.57	$ (0.27)	$ 1.89	$ (2.97)	$ 1.50	$ 2.37	$ 0.27	$ 2.64	$ 1.10	$ 3.73
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive common stock excluded from computation of dilutive earnings per share (in shares)										6,765,526	1,293,242	6,820,275

[1] 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 24.9%, 26.0% and 39.6% annualized statutory corporate tax rate for the years ended December 31, 2019, 2018 and 2017) attributable to the converted units.

[2] . Common stock equivalents exclude the effects of performance share units and options and warrants to purchase 6,765,526, 1,293,242 and 6,820,275 shares of PBF Energy Class A common stock and PBF LLC Series A units because they are anti-dilutive for the years ended December 31, 2019, 2018 and 2017, respectively.