CONDENSED CONSOLIDATING FINANCIAL STATEMENTS OF PBF HOLDINGS (Statement of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Proceeds from Sale of Equity Method Investments			$ 0
Cash flows from operating activities:
Net income	$ 79,500	$ 224,700	335,100	$ 624,600
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization			301,100	255,600
Stock-based compensation			22,800	14,100
Change in fair value of catalyst leases			6,400	(5,800)
Deferred income taxes	(2,200)	(800)	(7,500)	(5,500)
Non-cash change in inventory repurchase obligations			11,400	10,700
Non-cash lower of cost or market inventory adjustment			(277,000)	(300,500)
Pension and other post-retirement benefit costs			33,600	35,500
Income from equity method investee	0	(4,700)	(7,900)	(13,100)
Distributions from equity method investee			7,900	13,100
Gain on sale of assets			(31,800)	(43,100)
Equity in earnings of subsidiaries	0	0	0	0
Changes in operating assets and liabilities:
Accounts receivable			(162,900)	(113,600)
Due to/from affiliates			29,200	(16,700)
Inventories			10,600	(46,900)
Prepaid and other current assets			900	(8,600)
Accounts payable			54,900	(106,100)
Accrued expenses			74,600	302,600
Deferred revenue			(7,000)	4,500
Other assets and liabilities			(50,200)	(6,400)
Net cash provided by operating activities			344,200	594,400
Cash flows from investing activities:
Expenditures for property, plant and equipment			(285,800)	(165,700)
Expenditures for deferred turnaround costs			(282,600)	(201,000)
Expenditures for other assets			(38,200)	(16,900)
Proceeds from sale of assets			36,300	48,300
Equity method investment - return of capital			600	3,100
Due to/from affiliates			0	0
Net cash (used in) provided by investing activities			(569,700)	(332,200)
Cash flows from financing activities:
Contributions from PBF LLC			228,500	287,000
Distribution to members			(95,700)	(36,100)
Proceeds from affiliate notes payable			0
Repayments of Long-term Debt			(5,200)
Proceeds from revolver borrowings			1,350,000	0
Repayment of note payable				(5,600)
Due to/from affiliates			0	0
Repayments of revolver borrowings			(1,350,000)	0
Repayment of note payable			0	(5,600)
Catalyst lease settlements			(3,500)	(9,500)
Proceeds from insurance premium financing			7,500	7,000
Deferred financing costs and other			(500)	(12,700)
Net cash provided by financing activities			131,100	225,000
Net (decrease) increase in cash and cash equivalents			(94,400)	487,200
Cash and equivalents, beginning of period			561,700	526,200
Cash and equivalents, end of period	467,300	1,013,400	467,300	1,013,400
Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt				(5,100)
2020 Senior Secured Notes [Member]
Cash flows from financing activities:
Repayments of Long-term Debt			0
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Proceeds from Sale of Equity Method Investments			0
Cash flows from operating activities:
Net income	79,500	224,700	335,100	624,600
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization			12,400	12,500
Stock-based compensation			900	0
Change in fair value of catalyst leases			0	0
Deferred income taxes			0	0
Non-cash change in inventory repurchase obligations			11,400	10,700
Non-cash lower of cost or market inventory adjustment			(277,000)	(300,500)
Pension and other post-retirement benefit costs			6,600	5,600
Income from equity method investee		0	0	0
Distributions from equity method investee			0	0
Gain on sale of assets			0	0
Equity in earnings of subsidiaries	339,400	261,600	1,099,300	943,600
Changes in operating assets and liabilities:
Accounts receivable			(151,400)	(120,700)
Due to/from affiliates			(1,249,200)	(1,103,100)
Inventories			62,100	(83,700)
Prepaid and other current assets			4,300	(4,800)
Accounts payable			85,000	(69,500)
Accrued expenses			(135,200)	300,500
Deferred revenue			(7,100)	4,400
Other assets and liabilities			(11,700)	32,300
Net cash provided by operating activities			(214,500)	251,900
Cash flows from investing activities:
Expenditures for property, plant and equipment			(6,300)	(4,700)
Expenditures for deferred turnaround costs			0	0
Expenditures for other assets			0	0
Proceeds from sale of assets			0	0
Equity method investment - return of capital			0	0
Due to/from affiliates			(1,800)	(1,100)
Net cash (used in) provided by investing activities			(8,100)	(5,800)
Cash flows from financing activities:
Contributions from PBF LLC			228,500	287,000
Distribution to members			(93,900)	(36,100)
Proceeds from affiliate notes payable			0
Repayments of Long-term Debt			0
Proceeds from revolver borrowings			1,350,000
Repayment of note payable				0
Due to/from affiliates			0	0
Repayments of revolver borrowings			(1,350,000)
Repayment of note payable			0
Catalyst lease settlements			0	0
Proceeds from insurance premium financing			600	500
Deferred financing costs and other			0	(12,700)
Net cash provided by financing activities			135,200	238,700
Net (decrease) increase in cash and cash equivalents			(87,400)	484,800
Cash and equivalents, beginning of period			526,000	486,600
Cash and equivalents, end of period	438,600	971,400	438,600	971,400
Issuer [Member] | Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt				0
Issuer [Member] | 2020 Senior Secured Notes [Member]
Cash flows from financing activities:
Repayments of Long-term Debt			0
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Proceeds from Sale of Equity Method Investments			0
Cash flows from operating activities:
Net income	(339,400)	(261,600)	(1,099,300)	(943,600)
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization			282,800	237,300
Stock-based compensation			21,900	14,100
Change in fair value of catalyst leases			6,400	(5,800)
Deferred income taxes			0	0
Non-cash change in inventory repurchase obligations			0	0
Non-cash lower of cost or market inventory adjustment			0	0
Pension and other post-retirement benefit costs			27,000	29,900
Income from equity method investee		0	0	0
Distributions from equity method investee			0	0
Gain on sale of assets			(31,800)	(43,100)
Equity in earnings of subsidiaries	2,100	0	12,500	9,000
Changes in operating assets and liabilities:
Accounts receivable			1,500	(4,000)
Due to/from affiliates			1,397,300	1,112,100
Inventories			0	0
Prepaid and other current assets			(4,000)	(4,700)
Accounts payable			(35,800)	(34,200)
Accrued expenses			(1,800)	(6,000)
Deferred revenue			100	100
Other assets and liabilities			(29,100)	(21,800)
Net cash provided by operating activities			547,700	339,300
Cash flows from investing activities:
Expenditures for property, plant and equipment			(267,900)	(159,700)
Expenditures for deferred turnaround costs			(282,600)	(201,000)
Expenditures for other assets			(38,200)	(16,900)
Proceeds from sale of assets			36,300	48,300
Equity method investment - return of capital			0	0
Due to/from affiliates			0	0
Net cash (used in) provided by investing activities			(552,400)	(329,300)
Cash flows from financing activities:
Contributions from PBF LLC			0	0
Distribution to members			(1,800)	0
Proceeds from affiliate notes payable			0
Repayments of Long-term Debt			0
Proceeds from revolver borrowings			0
Repayment of note payable				(5,600)
Due to/from affiliates			1,800	1,100
Repayments of revolver borrowings			0
Repayment of note payable			0
Catalyst lease settlements			(3,500)	9,500
Proceeds from insurance premium financing			6,900	6,500
Deferred financing costs and other			(500)	0
Net cash provided by financing activities			2,900	(7,500)
Net (decrease) increase in cash and cash equivalents			(1,800)	2,500
Cash and equivalents, beginning of period			9,100	13,500
Cash and equivalents, end of period	7,300	16,000	7,300	16,000
Guarantor Subsidiaries [Member] | Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt				0
Guarantor Subsidiaries [Member] | 2020 Senior Secured Notes [Member]
Cash flows from financing activities:
Repayments of Long-term Debt			0
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Proceeds from Sale of Equity Method Investments			0
Cash flows from operating activities:
Net income	(2,100)	0	(12,500)	(9,000)
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization			5,900	5,800
Stock-based compensation			0	0
Change in fair value of catalyst leases			0	0
Deferred income taxes			(7,500)	(5,500)
Non-cash change in inventory repurchase obligations			0	0
Non-cash lower of cost or market inventory adjustment			0	0
Pension and other post-retirement benefit costs			0	0
Income from equity method investee		(4,700)	(7,900)	(13,100)
Distributions from equity method investee			7,900	13,100
Gain on sale of assets			0	0
Equity in earnings of subsidiaries	0	0	0	0
Changes in operating assets and liabilities:
Accounts receivable			(13,000)	11,100
Due to/from affiliates			(118,900)	(25,700)
Inventories			(51,500)	36,800
Prepaid and other current assets			600	900
Accounts payable			5,700	(2,400)
Accrued expenses			211,600	8,100
Deferred revenue			0	0
Other assets and liabilities			(9,400)	(16,900)
Net cash provided by operating activities			11,000	3,200
Cash flows from investing activities:
Expenditures for property, plant and equipment			(11,600)	(1,300)
Expenditures for deferred turnaround costs			0	0
Expenditures for other assets			0	0
Proceeds from sale of assets			0	0
Equity method investment - return of capital			600	3,100
Due to/from affiliates			0	0
Net cash (used in) provided by investing activities			(11,000)	1,800
Cash flows from financing activities:
Contributions from PBF LLC			0	0
Distribution to members			0	0
Proceeds from affiliate notes payable			0
Repayments of Long-term Debt			(5,200)
Proceeds from revolver borrowings			0
Repayment of note payable				0
Due to/from affiliates			0	0
Repayments of revolver borrowings			0
Repayment of note payable			0
Catalyst lease settlements			0	0
Proceeds from insurance premium financing			0	0
Deferred financing costs and other			0	0
Net cash provided by financing activities			(5,200)	(5,100)
Net (decrease) increase in cash and cash equivalents			(5,200)	(100)
Cash and equivalents, beginning of period			26,600	26,100
Cash and equivalents, end of period	21,400	26,000	21,400	26,000
Non-Guarantor Subsidiaries [Member] | Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt				(5,100)
Non-Guarantor Subsidiaries [Member] | 2020 Senior Secured Notes [Member]
Cash flows from financing activities:
Repayments of Long-term Debt			0
Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Proceeds from Sale of Equity Method Investments			0
Cash flows from operating activities:
Net income	341,500	261,600	1,111,800	952,600
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization			0	0
Stock-based compensation			0	0
Change in fair value of catalyst leases			0	0
Deferred income taxes			0	0
Non-cash change in inventory repurchase obligations			0	0
Non-cash lower of cost or market inventory adjustment			0	0
Pension and other post-retirement benefit costs			0	0
Income from equity method investee		0	0	0
Distributions from equity method investee			0	0
Gain on sale of assets			0	0
Equity in earnings of subsidiaries	(341,500)	(261,600)	(1,111,800)	(952,600)
Changes in operating assets and liabilities:
Accounts receivable			0	0
Due to/from affiliates			0	0
Inventories			0	0
Prepaid and other current assets			0	0
Accounts payable			0	0
Accrued expenses			0	0
Deferred revenue			0	0
Other assets and liabilities			0	0
Net cash provided by operating activities			0	0
Cash flows from investing activities:
Expenditures for property, plant and equipment			0	0
Expenditures for deferred turnaround costs			0	0
Expenditures for other assets			0	0
Proceeds from sale of assets			0	0
Equity method investment - return of capital			0	0
Due to/from affiliates			1,800	1,100
Net cash (used in) provided by investing activities			1,800	1,100
Cash flows from financing activities:
Contributions from PBF LLC			0	0
Distribution to members			0	0
Proceeds from affiliate notes payable			0
Repayments of Long-term Debt			0
Proceeds from revolver borrowings			0
Repayment of note payable				0
Due to/from affiliates			(1,800)	(1,100)
Repayments of revolver borrowings			0
Repayment of note payable			0
Catalyst lease settlements			0	0
Proceeds from insurance premium financing			0	0
Deferred financing costs and other			0	0
Net cash provided by financing activities			(1,800)	(1,100)
Net (decrease) increase in cash and cash equivalents			0	0
Cash and equivalents, beginning of period			0	0
Cash and equivalents, end of period	$ 0	$ 0	0	0
Consolidation, Eliminations [Member] | Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt				$ 0
Consolidation, Eliminations [Member] | 2020 Senior Secured Notes [Member]
Cash flows from financing activities:
Repayments of Long-term Debt			$ 0