INVENTORIES (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2019		Sep. 30, 2018	Sep. 30, 2019		Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Inventory [Line Items]
Crude oil and feedstocks		$ 1,086.0			$ 1,086.0				$ 1,044.8
Refined products and blendstocks		1,300.8			1,300.8				1,361.7
Warehouse stock and other		118.4			118.4				111.1
Inventory, Gross		2,505.2			2,505.2				2,517.6
Lower of cost or market adjustment		374.8		$ 0.0	374.8		$ 0.0		651.8	$ (54.8)	$ (300.5)
Excess of Replacement or Current Costs over Stated LIFO Value				12.0			12.0
Inventories		2,130.4			2,130.4				1,865.8
Income (loss) from operations	[2]	151.9	[1]	286.3	526.0	[1]	804.3
Net income		86.3		192.5	306.1		522.0
Titled Inventory [Member]
Inventory [Line Items]
Crude oil and feedstocks		1,065.6			1,065.6				1,044.8
Refined products and blendstocks		1,034.0			1,034.0				1,026.9
Warehouse stock and other		118.4			118.4				111.1
Inventory, Gross		2,218.0			2,218.0				2,182.8
Lower of cost or market adjustment		292.4			292.4				557.2
Inventories		1,925.6			1,925.6				1,625.6
Inventory Supply and Offtake Arrangements [Member]
Inventory [Line Items]
Crude oil and feedstocks		20.4			20.4				0.0
Refined products and blendstocks		266.8			266.8				334.8
Warehouse stock and other		0.0			0.0				0.0
Inventory, Gross		287.2			287.2				334.8
Lower of cost or market adjustment		82.4			82.4				94.6
Inventories		204.8			204.8				240.2
Scenario, Adjustment [Member]
Inventory [Line Items]
Lower of cost or market adjustment		374.8			374.8			$ 327.8	$ 651.8
Income (loss) from operations		$ (47.0)		$ 54.8	$ 277.0		$ 300.5

[1] (1) On April 24, 2019, PBFX entered into the TVPC Contribution Agreement, pursuant to which PBF LLC contributed to PBFX all of the issued and outstanding limited liability company interests of TVP Holding. Prior to the TVPC Acquisition, TVP Holding owned a 50% membership interest in TVPC. Subsequent to the closing of the TVPC Acquisition on May 31, 2019, PBFX owns 100% of the membership interests in TVPC.

[2] (2) Prior to the TVPC Contribution Agreement, the Logistics segment included 100% of the income from operations of TVPC, as TVPC was consolidated by PBFX. PBFX recorded net income attributable to noncontrolling interest for the 50% equity interest in TVPC held by PBF Holding. PBF Holding (included in the Refining segment) recorded equity income in investee related to its 50% noncontrolling ownership interest in TVPC. For purposes of the Company’s Condensed Consolidated Financial Statements, PBF Holding’s equity income in investee and PBFX’s net income attributable to noncontrolling interest eliminated in consolidation.