Condensed Consolidated Statements of Changes in Equity Statement - USD ($) $ in Millions	Total	Member's Equity [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]
Beginning balance at Dec. 31, 2019	$ 3,897.2	$ 2,739.1	$ (9.7)	$ 1,156.9	$ 10.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Member distributions	(22.2)			(22.2)
Capital contributions from PBF LLC	33.4	33.4
Stock-based compensation	21.4	21.4
Comprehensive income (loss)	(1,411.5)		1.4	(1,412.8)	(0.1)
Ending balance at Sep. 30, 2020	2,518.3	2,793.9	(8.3)	(278.1)	10.8
Beginning balance at Jun. 30, 2020	2,959.0	2,777.0	(8.6)	179.7	10.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Member distributions	(1.1)			(1.1)
Capital contributions from PBF LLC	9.0	9.0
Stock-based compensation	7.9	7.9
Comprehensive income (loss)	(456.5)		0.3	(456.7)	(0.1)
Ending balance at Sep. 30, 2020	2,518.3	2,793.9	(8.3)	(278.1)	10.8
Beginning balance at Dec. 31, 2020	2,090.8	2,809.7	(6.1)	(723.4)	10.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Member distributions	(2.0)			(2.0)
Capital contributions from PBF LLC	28.0	28.0
Distribution of assets to PBF LLC	(0.3)	(0.3)
Stock-based compensation	18.3	18.3
Comprehensive income (loss)	50.9		0.1	48.5	2.3
Other	(0.7)				(0.7)
Ending balance at Sep. 30, 2021	2,185.0	2,855.7	(6.0)	(676.9)	12.2
Beginning balance at Jun. 30, 2021	2,105.3	2,841.1	(6.2)	(741.9)	12.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital contributions from PBF LLC	9.1	9.1
Stock-based compensation	5.5	5.5
Comprehensive income (loss)	65.1		0.2	65.0	(0.1)
Ending balance at Sep. 30, 2021	$ 2,185.0	$ 2,855.7	$ (6.0)	$ (676.9)	$ 12.2