CONDENSED CONSOLIDATING FINANCIAL STATEMENTS OF PBF HOLDINGS (Statement of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ (56,500)	$ 312,100	$ 367,500	$ 32,400	$ 255,600	$ 399,900
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization					198,400	168,100
Stock-based compensation					15,700	9,500
Change in fair value of catalyst leases					2,600	(4,100)
Deferred income taxes	1,900		(4,000)		(5,300)	(4,700)
Non-cash change in inventory repurchase obligations					35,000	2,500
Non-cash lower of cost or market inventory adjustment					(324,000)	(245,700)
Pension and other post-retirement benefit costs					22,400	23,700
Income from equity method investee	(3,200)		(4,400)		(7,900)	(8,400)
Distributions from equity method investee					7,900	8,400
Loss on sale of assets					800	700
Equity in earnings (loss) of subsidiaries	0		0		0	0
Changes in operating assets and liabilities:
Accounts receivable					(274,100)	(80,400)
Due to/from affiliates					12,900	(7,700)
Inventories					(124,600)	(80,800)
Prepaid and other current assets					(34,100)	(1,800)
Accounts payable					(34,300)	64,300
Accrued expenses					200,000	900
Deferred revenue					5,300	(3,900)
Other assets and liabilities					(28,300)	(10,000)
Net cash (used in) provided by operating activities					(76,000)	230,500
Cash flows from investing activities:
Expenditures for property, plant and equipment					(190,900)	(110,200)
Expenditures for deferred turnaround costs					(261,900)	(179,200)
Expenditures for other assets					(33,900)	(12,300)
Equity method investment - return of capital					600	2,800
Net cash (used in) provided by investing activities					(486,100)	(298,900)
Cash flows from financing activities:
Contributions from PBF LLC					(202,500)	(22,000)
Distribution to members					(59,400)	(26,500)
Repayments of Long-term Debt					(3,500)
Repayment of notes payable						2,400
Catalyst lease settlements					(1,200)	(9,500)
Proceeds from revolver borrowings					1,250,000	0
Repayments of revolver borrowings					(1,250,000)	0
Repayments of Notes Payable					0	2,400
Proceeds from insurance premium financing					18,900	17,400
Deferred financing costs and other					(100)	(12,700)
Net cash provided by (used in) financing activities					157,200	(15,100)
Net decrease in cash and cash equivalents					(404,900)	(83,500)
Cash and equivalents, beginning of period		561,700		526,200	561,700	526,200
Cash and equivalents, end of period	156,800		442,700		156,800	442,700
Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt						(3,400)
Issuer [Member]
Cash flows from operating activities:
Net income	(56,500)		367,500		255,600	399,900
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization					8,700	8,400
Stock-based compensation					600	0
Change in fair value of catalyst leases					0	0
Deferred income taxes					0	0
Non-cash change in inventory repurchase obligations					35,000	2,500
Non-cash lower of cost or market inventory adjustment					(324,000)	(245,700)
Pension and other post-retirement benefit costs					4,000	3,500
Income from equity method investee	0		0		0	0
Distributions from equity method investee					0	0
Loss on sale of assets					0	0
Equity in earnings (loss) of subsidiaries	311,300		304,300		759,900	682,000
Changes in operating assets and liabilities:
Accounts receivable					(275,500)	(89,100)
Due to/from affiliates					(874,300)	(866,200)
Inventories					(104,500)	(125,700)
Prepaid and other current assets					(23,500)	1,600
Accounts payable					(800)	94,200
Accrued expenses					(9,600)	61,100
Deferred revenue					5,300	(2,400)
Other assets and liabilities					(6,800)	8,600
Net cash (used in) provided by operating activities					(549,900)	(67,300)
Cash flows from investing activities:
Expenditures for property, plant and equipment					(3,700)	(2,600)
Expenditures for deferred turnaround costs					0	0
Expenditures for other assets					0	0
Equity method investment - return of capital					0	0
Net cash (used in) provided by investing activities					(3,700)	(2,600)
Cash flows from financing activities:
Contributions from PBF LLC					(202,500)	(22,000)
Distribution to members					(57,700)	(26,500)
Repayments of Long-term Debt					0
Repayment of notes payable						0
Catalyst lease settlements					0	0
Proceeds from revolver borrowings					1,250,000
Repayments of revolver borrowings					(1,250,000)
Proceeds from insurance premium financing					1,700	1,200
Deferred financing costs and other					0	12,700
Net cash provided by (used in) financing activities					146,500	(16,000)
Net decrease in cash and cash equivalents					(407,100)	(85,900)
Cash and equivalents, beginning of period		526,000		486,600	526,000	486,600
Cash and equivalents, end of period	118,900				118,900
Issuer [Member] | Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt						0
Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net income	(311,300)		(304,300)		(759,900)	(682,000)
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization					185,800	155,800
Stock-based compensation					15,100	9,500
Change in fair value of catalyst leases					2,600	(4,100)
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					18,400	20,200
Income from equity method investee	0		0		0	0
Distributions from equity method investee					0	0
Loss on sale of assets					800	700
Equity in earnings (loss) of subsidiaries	(7,400)		9,900		10,400	9,000
Changes in operating assets and liabilities:
Accounts receivable					400	(1,400)
Due to/from affiliates					1,048,700	849,500
Inventories					0	0
Prepaid and other current assets					(10,800)	(3,800)
Accounts payable					(30,500)	(24,900)
Accrued expenses					(3,700)	(23,500)
Deferred revenue					0	(1,500)
Other assets and liabilities					(12,100)	(7,000)
Net cash (used in) provided by operating activities					465,200	296,500
Cash flows from investing activities:
Expenditures for property, plant and equipment					(184,800)	(106,600)
Expenditures for deferred turnaround costs					(261,900)	(179,200)
Expenditures for other assets					(33,900)	(12,300)
Equity method investment - return of capital					0	0
Net cash (used in) provided by investing activities					(480,600)	(298,100)
Cash flows from financing activities:
Contributions from PBF LLC					0	0
Distribution to members					(1,700)	0
Repayments of Long-term Debt					0
Repayment of notes payable						2,400
Catalyst lease settlements					(1,200)	9,500
Proceeds from revolver borrowings					0
Repayments of revolver borrowings					0
Proceeds from insurance premium financing					17,200	16,200
Deferred financing costs and other					(100)	0
Net cash provided by (used in) financing activities					14,200	4,300
Net decrease in cash and cash equivalents					(1,200)	2,700
Cash and equivalents, beginning of period		9,100		13,500	9,100	13,500
Cash and equivalents, end of period	7,900				7,900
Guarantor Subsidiaries [Member] | Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt						0
Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net income	7,400		(9,900)		(10,400)	(9,000)
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization					3,900	3,900
Stock-based compensation					0	0
Change in fair value of catalyst leases					0	0
Deferred income taxes					(5,300)	(4,700)
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	(3,200)		(4,400)		(7,900)	(8,400)
Distributions from equity method investee					7,900	8,400
Loss on sale of assets					0	0
Equity in earnings (loss) of subsidiaries	0		0		0	0
Changes in operating assets and liabilities:
Accounts receivable					1,000	10,100
Due to/from affiliates					(161,500)	9,000
Inventories					(20,100)	44,900
Prepaid and other current assets					200	400
Accounts payable					(3,000)	(5,000)
Accrued expenses					213,300	(36,700)
Deferred revenue					0	0
Other assets and liabilities					(9,400)	(11,600)
Net cash (used in) provided by operating activities					8,700	1,300
Cash flows from investing activities:
Expenditures for property, plant and equipment					(2,400)	(1,000)
Expenditures for deferred turnaround costs					0	0
Expenditures for other assets					0	0
Equity method investment - return of capital					600	2,800
Net cash (used in) provided by investing activities					(1,800)	1,800
Cash flows from financing activities:
Contributions from PBF LLC					0	0
Distribution to members					0	0
Repayments of Long-term Debt					(3,500)
Repayment of notes payable						0
Catalyst lease settlements					0	0
Proceeds from revolver borrowings					0
Repayments of revolver borrowings					0
Proceeds from insurance premium financing					0	0
Deferred financing costs and other					0	0
Net cash provided by (used in) financing activities					(3,500)	(3,400)
Net decrease in cash and cash equivalents					3,400	(300)
Cash and equivalents, beginning of period		26,600		26,100	26,600	26,100
Cash and equivalents, end of period	30,000				30,000
Non-Guarantor Subsidiaries [Member] | Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt						(3,400)
Consolidation, Eliminations [Member]
Cash flows from operating activities:
Net income	303,900		314,200		770,300	691,000
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	0
Distributions from equity method investee					0	0
Loss on sale of assets					0	0
Equity in earnings (loss) of subsidiaries	(303,900)		$ (314,200)		(770,300)	(691,000)
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 (used in) 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
Equity method investment - return of capital					0	0
Net cash (used in) provided by investing activities					0	0
Cash flows from financing activities:
Contributions from PBF LLC					0	0
Distribution to members					0	0
Repayments of Long-term Debt					0
Repayment of notes payable						0
Catalyst lease settlements					0	0
Proceeds from revolver borrowings					0
Repayments of revolver borrowings					0
Proceeds from insurance premium financing					0	0
Deferred financing costs and other					0	0
Net cash provided by (used in) financing activities					0	0
Net decrease in cash and cash equivalents					0	0
Cash and equivalents, beginning of period		$ 0		$ 0	0	0
Cash and equivalents, end of period	$ 0				$ 0
Consolidation, Eliminations [Member] | Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt						$ 0