CONDENSED CONSOLIDATING FINANCIAL STATEMENTS OF PBF HOLDINGS (Statement of Operations) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues	$ 6,551.9		$ 7,440.5		$ 11,760.6	$ 13,240.1
Cost and expenses:
Cost of products and other	6,025.4		6,512.2		10,301.6	11,701.8
Operating expenses (excluding depreciation and amortization expense as reflected below)	409.7		402.7		863.1	814.1
Depreciation and amortization expense	95.3		82.8		189.6	159.6
Cost of sales	6,530.4		6,997.7		11,354.3	12,675.5
General and administrative expenses (excluding depreciation and amortization expense as reflected below)	46.6		51.8		97.8	110.1
Depreciation and amortization expense	2.9		2.6		5.7	5.3
Equity income in investee	(3.2)		(4.4)		(7.9)	(8.4)
Loss on sale of assets	0.8		0.6		0.8	0.7
Total cost and expenses	6,577.5		7,048.3		11,450.7	12,783.2
Income (loss) from operations	(25.6)		392.2		309.9	456.9
Other income (expense):
Equity in earnings of subsidiaries	0.0		0.0		0.0	0.0
Change in fair value of catalyst leases	0.5		4.1		(2.6)	4.1
Interest expense, net	(29.6)		(33.0)		(57.0)	(66.3)
Other non-service component of net periodic benefit costs	0.0		0.2		(0.1)	0.5
Income (loss) before income taxes	(54.7)		363.5		250.2	395.2
Income tax expense (benefit)	1.8		(4.0)		(5.4)	(4.7)
Net income (loss)	(56.5)	$ 312.1	367.5	$ 32.4	255.6	399.9
Less: net income attributable to noncontrolling interests	0.1		0.0		0.1	0.0
Net income (loss) attributable to PBF Holding Company LLC	(56.6)		367.5		255.5	399.9
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(56.1)		367.5		256.2	400.2
Guarantor Subsidiaries [Member]
Revenues	350.8		342.1		1,201.1	1,053.8
Cost and expenses:
Cost of products and other	164.3		157.1		894.9	761.4
Operating expenses (excluding depreciation and amortization expense as reflected below)	401.6		394.7		847.7	799.7
Depreciation and amortization expense	93.4		80.9		185.8	155.8
Cost of sales	659.3		632.7		1,928.4	1,716.9
General and administrative expenses (excluding depreciation and amortization expense as reflected below)	9.9		7.1		18.5	13.1
Depreciation and amortization expense	0.0		0.0		0.0	0.0
Equity income in investee	0.0		0.0		0.0	0.0
Loss on sale of assets	0.8		0.6		0.8	0.7
Total cost and expenses	670.0		640.4		1,947.7	1,730.7
Income (loss) from operations	(319.2)		(298.3)		(746.6)	(676.9)
Other income (expense):
Equity in earnings of subsidiaries	7.4		(9.9)		(10.4)	(9.0)
Change in fair value of catalyst leases	0.5		4.1		(2.6)	4.1
Interest expense, net	(0.2)		(0.5)		(0.6)	(0.9)
Other non-service component of net periodic benefit costs	0.2		0.3		0.3	0.7
Income (loss) before income taxes	(311.3)		(304.3)		(759.9)	(682.0)
Income tax expense (benefit)	0.0		0.0		0.0	0.0
Net income (loss)	(311.3)		(304.3)		(759.9)	(682.0)
Less: net income attributable to noncontrolling interests	0.1				0.1
Net income (loss) attributable to PBF Holding Company LLC	(311.4)				(760.0)	(682.0)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(311.4)		(304.3)		(760.0)	(682.0)
Non-Guarantor Subsidiaries [Member]
Revenues	973.7		903.6		1,578.4	1,589.2
Cost and expenses:
Cost of products and other	958.3		910.8		1,584.0	1,590.4
Operating expenses (excluding depreciation and amortization expense as reflected below)	8.1		8.0		15.4	14.4
Depreciation and amortization expense	1.9		1.9		3.8	3.8
Cost of sales	968.3		920.7		1,603.2	1,608.6
General and administrative expenses (excluding depreciation and amortization expense as reflected below)	(0.9)		0.9		(1.6)	2.2
Depreciation and amortization expense	0.0		0.0		0.0	0.0
Equity income in investee	(3.2)		(4.4)		(7.9)	(8.4)
Loss on sale of assets	0.0		0.0		0.0	0.0
Total cost and expenses	964.2		917.2		1,593.7	1,602.4
Income (loss) from operations	9.5		(13.6)		(15.3)	(13.2)
Other income (expense):
Equity in earnings of subsidiaries	0.0		0.0		0.0	0.0
Change in fair value of catalyst leases	0.0		0.0		0.0	0.0
Interest expense, net	(0.3)		(0.3)		(0.5)	(0.5)
Other non-service component of net periodic benefit costs	0.0		0.0		0.0	0.0
Income (loss) before income taxes	9.2		(13.9)		(15.8)	(13.7)
Income tax expense (benefit)	1.8		(4.0)		(5.4)	(4.7)
Net income (loss)	7.4		(9.9)		(10.4)	(9.0)
Less: net income attributable to noncontrolling interests	0.0				0.0
Net income (loss) attributable to PBF Holding Company LLC	7.4				(10.4)	(9.0)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	7.4		(9.9)		(10.4)	(9.0)
Issuer [Member]
Revenues	6,521.0		7,379.2		11,709.9	13,113.9
Cost and expenses:
Cost of products and other	6,196.4		6,628.7		10,551.5	11,866.8
Operating expenses (excluding depreciation and amortization expense as reflected below)	0.0		0.0		0.0	0.0
Depreciation and amortization expense	0.0		0.0		0.0	0.0
Cost of sales	6,196.4		6,628.7		10,551.5	11,866.8
General and administrative expenses (excluding depreciation and amortization expense as reflected below)	37.6		43.8		80.9	94.8
Depreciation and amortization expense	2.9		2.6		5.7	5.3
Equity income in investee	0.0		0.0		0.0	0.0
Loss on sale of assets	0.0		0.0		0.0	0.0
Total cost and expenses	6,236.9		6,675.1		10,638.1	11,966.9
Income (loss) from operations	284.1		704.1		1,071.8	1,147.0
Other income (expense):
Equity in earnings of subsidiaries	(311.3)		(304.3)		(759.9)	(682.0)
Change in fair value of catalyst leases	0.0		0.0		0.0	0.0
Interest expense, net	(29.1)		(32.2)		(55.9)	(64.9)
Other non-service component of net periodic benefit costs	(0.2)		(0.1)		(0.4)	(0.2)
Income (loss) before income taxes	(56.5)		367.5		255.6	399.9
Income tax expense (benefit)	0.0		0.0		0.0	0.0
Net income (loss)	(56.5)		367.5		255.6	399.9
Less: net income attributable to noncontrolling interests	0.1				0.1
Net income (loss) attributable to PBF Holding Company LLC	(56.6)				255.5	399.9
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(56.1)		367.5		256.2	400.2
Consolidation, Eliminations [Member]
Revenues	(1,293.6)		(1,184.4)		(2,728.8)	(2,516.8)
Cost and expenses:
Cost of products and other	(1,293.6)		(1,184.4)		(2,728.8)	(2,516.8)
Operating expenses (excluding depreciation and amortization expense as reflected below)	0.0		0.0		0.0	0.0
Depreciation and amortization expense	0.0		0.0		0.0	0.0
Cost of sales	(1,293.6)		(1,184.4)		(2,728.8)	(2,516.8)
General and administrative expenses (excluding depreciation and amortization expense as reflected below)	0.0		0.0		0.0	0.0
Depreciation and amortization expense	0.0		0.0		0.0	0.0
Equity income in investee	0.0		0.0		0.0	0.0
Loss on sale of assets	0.0		0.0		0.0	0.0
Total cost and expenses	(1,293.6)		(1,184.4)		(2,728.8)	(2,516.8)
Income (loss) from operations	0.0		0.0		0.0	0.0
Other income (expense):
Equity in earnings of subsidiaries	303.9		314.2		770.3	691.0
Change in fair value of catalyst leases	0.0		0.0		0.0	0.0
Interest expense, net	0.0		0.0		0.0	0.0
Other non-service component of net periodic benefit costs	0.0		0.0		0.0	0.0
Income (loss) before income taxes	303.9		314.2		770.3	691.0
Income tax expense (benefit)	0.0		0.0		0.0	0.0
Net income (loss)	303.9		314.2		770.3	691.0
Less: net income attributable to noncontrolling interests	(0.1)				(0.1)
Net income (loss) attributable to PBF Holding Company LLC	304.0				770.4	691.0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 304.0		$ 314.2		$ 770.4	$ 691.0