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	(21.1)	0.0	0.0	(21.1)	0.0
Stock-based compensation expense	6.8	6.8	0.0	0.0	0.0
Comprehensive income (loss)	(1,473.8)	0.0	0.8	(1,474.6)	0.0
Ending balance at Mar. 31, 2020	2,409.1	2,745.9	(8.9)	(338.8)	10.9
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	(1.0)	0.0	0.0	(1.0)	0.0
Capital contributions from PBF LLC	10.0	10.0	0.0	0.0	0.0
Stock-based compensation expense	5.9	5.9	0.0	0.0	0.0
Comprehensive income (loss)	(57.3)	0.0	(0.4)	(57.1)	0.2
Ending balance at Mar. 31, 2021	$ 2,048.4	$ 2,825.6	$ (6.5)	$ (781.5)	$ 10.8