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, 2017	$ 3,183.9	$ 2,359.7	$ (27.0)	$ 840.4	$ 10.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	4.3	4.3
Net income	32.4			32.4
Other comprehensive income	0.3		0.3
Other	(1.2)			(1.2)
Ending balance at Mar. 31, 2018	3,219.7	2,364.0	(26.7)	871.6	10.8
Beginning balance at Dec. 31, 2018	3,529.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Member distributions	(23.0)			(23.0)
Distribution of assets to PBF LLC	(0.3)	(0.3)
Stock-based compensation	6.2	6.2
Net income	312.1			312.1
Other comprehensive income	0.2		0.2
Ending balance at Mar. 31, 2019	$ 3,825.0	$ 2,658.4	$ (23.7)	$ 1,179.4	$ 10.9