CONDENSED CONSOLIDATING FINANCIAL STATEMENTS OF PBF HOLDINGS (Statement of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 312,100	$ 32,400
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	98,700	81,100
Stock-based compensation	7,100	4,300
Change in fair value of catalyst leases	3,100	0
Deferred income taxes	(7,200)	(700)
Non-cash lower of cost or market inventory adjustment	(506,000)	(87,700)
Non-cash change in inventory repurchase obligations	14,200	8,800
Debt extinguishment costs		0
Pension and other post-retirement benefit costs	11,200	11,800
Equity income in investee	(4,700)	(4,000)
Distributions from equity method investee	4,700	4,000
Loss on sale of assets	0	100
Equity in earnings of subsidiaries	0	0
Changes in operating assets and liabilities:
Accounts receivable	(152,700)	121,400
Due to/from affiliates	10,300	(5,400)
Inventories	(194,700)	(278,300)
Prepaid and other current assets	(70,000)	(36,200)
Accounts payable	40,600	32,200
Accrued expenses	213,300	(22,900)
Deferred revenue	46,500	(2,000)
Other assets and liabilities	(11,500)	(6,000)
Net cash provided by operating activities	(185,000)	(147,100)
Cash flows from investing activities:
Expenditures for property, plant and equipment	(94,200)	(21,000)
Expenditures for deferred turnaround costs	(133,000)	(58,800)
Expenditures for other assets	(22,200)	(9,500)
Equity method investment - return of capital	1,800	1,000
Due to/from affiliates		0
Net cash used in investing activities	(247,600)	(88,300)
Cash flows from financing activities:
Repayments of Related Party Debt		1,200
Distribution to members	(23,000)	0
Repayments of Long-term Debt	(1,700)
Proceeds from revolver borrowings	575,000	0
Repayments of revolver borrowings	(325,000)	0
Due to/from affiliates		0
Proceeds from insurance premium financing	30,200	27,900
Net cash provided by financing activities	255,500	25,000
Net decrease in cash and cash equivalents	(177,100)	(210,400)
Cash and equivalents, beginning of period	561,700	526,200
Cash and equivalents, end of period	384,600	315,800
Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt		(1,700)
Issuer [Member]
Cash flows from operating activities:
Net income	312,100	32,400
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	4,400	4,300
Stock-based compensation	300	0
Change in fair value of catalyst leases	0
Deferred income taxes	0	0
Non-cash lower of cost or market inventory adjustment	(506,000)	(87,700)
Non-cash change in inventory repurchase obligations	14,200	8,800
Debt extinguishment costs		0
Pension and other post-retirement benefit costs	2,000	1,600
Equity income in investee	0	0
Distributions from equity method investee	0	0
Loss on sale of assets		0
Equity in earnings of subsidiaries	448,600	377,700
Changes in operating assets and liabilities:
Accounts receivable	(148,400)	116,300
Due to/from affiliates	(482,300)	(522,300)
Inventories	(177,200)	(247,400)
Prepaid and other current assets	(42,900)	(6,900)
Accounts payable	32,700	69,400
Accrued expenses	85,700	55,400
Deferred revenue	46,500	(2,000)
Other assets and liabilities	(1,400)	500
Net cash provided by operating activities	(411,700)	(199,900)
Cash flows from investing activities:
Expenditures for property, plant and equipment	(2,200)	(1,000)
Expenditures for deferred turnaround costs	0	0
Expenditures for other assets	0	0
Equity method investment - return of capital	0	0
Due to/from affiliates		(4,300)
Net cash used in investing activities	(2,200)	(5,300)
Cash flows from financing activities:
Repayments of Related Party Debt		0
Distribution to members	(22,800)
Repayments of Long-term Debt	0
Proceeds from revolver borrowings	575,000
Repayments of revolver borrowings	(325,000)
Due to/from affiliates		0
Proceeds from insurance premium financing	2,800	2,000
Net cash provided by financing activities	230,000	2,000
Net decrease in cash and cash equivalents	(183,900)	(203,200)
Cash and equivalents, beginning of period	526,000	486,600
Cash and equivalents, end of period	342,100
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	(448,600)	(377,700)
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	92,400	74,900
Stock-based compensation	6,800	4,300
Change in fair value of catalyst leases	3,100
Deferred income taxes	0	0
Non-cash lower of cost or market inventory adjustment	0	0
Non-cash change in inventory repurchase obligations	0	0
Debt extinguishment costs		0
Pension and other post-retirement benefit costs	9,200	10,200
Equity income in investee	0	0
Distributions from equity method investee	0	0
Loss on sale of assets		100
Equity in earnings of subsidiaries	17,800	(900)
Changes in operating assets and liabilities:
Accounts receivable	300	700
Due to/from affiliates	619,900	453,000
Inventories	0	0
Prepaid and other current assets	(27,200)	(29,600)
Accounts payable	11,700	(31,400)
Accrued expenses	(60,300)	(45,800)
Deferred revenue	0	0
Other assets and liabilities	(2,500)	(1,600)
Net cash provided by operating activities	222,600	56,200
Cash flows from investing activities:
Expenditures for property, plant and equipment	(90,900)	(19,700)
Expenditures for deferred turnaround costs	(133,000)	(58,800)
Expenditures for other assets	(22,200)	(9,500)
Equity method investment - return of capital	0	0
Due to/from affiliates		0
Net cash used in investing activities	(246,100)	(88,000)
Cash flows from financing activities:
Repayments of Related Party Debt		1,200
Distribution to members	(200)
Repayments of Long-term Debt	0
Proceeds from revolver borrowings	0
Repayments of revolver borrowings	0
Due to/from affiliates		4,300
Proceeds from insurance premium financing	27,400	25,900
Net cash provided by financing activities	27,200	29,000
Net decrease in cash and cash equivalents	3,700	(2,800)
Cash and equivalents, beginning of period	9,100	13,500
Cash and equivalents, end of period	12,800
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	(17,800)	900
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	1,900	1,900
Stock-based compensation	0	0
Change in fair value of catalyst leases	0
Deferred income taxes	(7,200)	(700)
Non-cash lower of cost or market inventory adjustment	0	0
Non-cash change in inventory repurchase obligations	0	0
Debt extinguishment costs		0
Pension and other post-retirement benefit costs	0	0
Equity income in investee	(4,700)	(4,000)
Distributions from equity method investee	4,700	4,000
Loss on sale of assets		0
Equity in earnings of subsidiaries	0	0
Changes in operating assets and liabilities:
Accounts receivable	(4,600)	4,400
Due to/from affiliates	(127,300)	63,900
Inventories	(17,500)	(30,900)
Prepaid and other current assets	100	300
Accounts payable	(3,800)	(5,800)
Accrued expenses	187,900	(32,500)
Deferred revenue	0	0
Other assets and liabilities	(7,600)	(4,900)
Net cash provided by operating activities	4,100	(3,400)
Cash flows from investing activities:
Expenditures for property, plant and equipment	(1,100)	(300)
Expenditures for deferred turnaround costs	0	0
Expenditures for other assets	0	0
Equity method investment - return of capital	1,800	1,000
Due to/from affiliates		0
Net cash used in investing activities	700	700
Cash flows from financing activities:
Repayments of Related Party Debt		0
Distribution to members	0
Repayments of Long-term Debt	(1,700)
Proceeds from revolver borrowings	0
Repayments of revolver borrowings	0
Due to/from affiliates		0
Proceeds from insurance premium financing	0	0
Net cash provided by financing activities	(1,700)	(1,700)
Net decrease in cash and cash equivalents	3,100	(4,400)
Cash and equivalents, beginning of period	26,600	26,100
Cash and equivalents, end of period	29,700
Non-Guarantor Subsidiaries [Member] | Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt		(1,700)
Consolidation, Eliminations [Member]
Cash flows from operating activities:
Net income	466,400	376,800
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
Deferred income taxes	0	0
Non-cash lower of cost or market inventory adjustment	0	0
Non-cash change in inventory repurchase obligations	0	0
Debt extinguishment costs		0
Pension and other post-retirement benefit costs	0	0
Equity income in investee	0	0
Distributions from equity method investee	0	0
Loss on sale of assets		0
Equity in earnings of subsidiaries	(466,400)	(376,800)
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
Equity method investment - return of capital	0	0
Due to/from affiliates		4,300
Net cash used in investing activities	0	4,300
Cash flows from financing activities:
Repayments of Related Party Debt		0
Distribution to members	0
Repayments of Long-term Debt	0
Proceeds from revolver borrowings	0
Repayments of revolver borrowings	0
Due to/from affiliates		(4,300)
Proceeds from insurance premium financing	0	0
Net cash provided by financing activities	0	(4,300)
Net decrease in cash and cash equivalents	0	0
Cash and equivalents, beginning of period	0	0
Cash and equivalents, end of period	$ 0
Consolidation, Eliminations [Member] | Rail Facility [Member]
Cash flows from financing activities:
Repayments of Long-term Debt		$ 0