CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 1,803.8	$ 3,708.9	$ 239.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	551.6	495.6	444.3
Stock-based compensation	51.5	44.1	30.3
Change in fair value of catalyst obligations	(1.1)	2.0	(8.5)
Deferred income taxes	3.7	(3.2)	(14.5)
Non-cash change in inventory repurchase obligations	0.0	(5.4)	(8.4)
Non-cash lower of cost or market inventory adjustment	0.0	0.0	(669.6)
Change in fair value of contingent consideration, net	(45.8)	48.1	29.4
Loss (gain) on extinguishment of debt	5.7	66.1	(79.9)
Pension and other post-retirement benefit costs	47.9	47.6	50.8
(Gain) loss on sale of assets	(1.3)	0.9	(0.2)
Changes in operating assets and liabilities:
Accounts receivable	115.5	(179.6)	(770.5)
Due to/from affiliates	12.7	(25.7)	9.3
Inventories	(334.1)	(258.5)	(149.3)
Prepaid and other current assets	(11.2)	(5.0)	(15.3)
Accounts payable	125.9	(97.7)	480.1
Accrued expenses	(764.9)	860.8	806.9
Deferred revenue	26.1	(2.8)	(4.8)
Other assets and liabilities	(108.0)	0.0	(76.9)
Net cash provided by operating activities	1,478.0	4,696.2	292.3
Cash flows from investing activities:
Expenditures for property, plant and equipment	(647.7)	(625.4)	(240.5)
Expenditures for deferred turnaround costs	(473.5)	(311.6)	(117.7)
Expenditures for other assets	(40.5)	(66.0)	(28.9)
Proceeds from sale of assets	4.4	0.0	0.0
Net cash used in investing activities	(1,157.3)	(1,003.0)	(387.1)
Cash flows from financing activities:
Contributions from PBF LLC	1,159.6	56.4	37.0
Proceeds from revolver borrowings	0.0	400.0	0.0
Repayments of revolver borrowings	0.0	(1,300.0)	0.0
Settlements of precious metal catalyst obligations	(3.1)	(56.2)	(31.7)
Payments on financing leases	(14.1)	(11.3)	(17.8)
Proceeds from insurance premium financing	13.0	2.1	0.0
Payments of contingent consideration	(80.1)	0.0	0.0
Deferred financing costs and other	(35.8)	(31.3)	0.5
Net cash used in financing activities	(713.8)	(2,845.0)	(169.6)
Net change in cash and cash equivalents	(393.1)	848.2	(264.4)
Cash and cash equivalents, beginning of period	2,153.9	1,305.7	1,570.1
Cash and cash equivalents, end of period	1,760.8	2,153.9	1,305.7
Non-cash activities:
Distribution of assets to PBF Energy Company LLC	(853.4)	0.0	0.0
Accrued and unpaid capital expenditures	143.5	165.2	103.2
Assets acquired or remeasured under operating and financing leases	335.4	82.8	(106.6)
Cash paid during the year for:
Interest (net of capitalized interest of $38.0, $24.8 and $8.9 in 2023, 2022 and 2021, respectively)	95.5	211.5	265.4
Income taxes	1.6	0.8	1.0
2030 Senior Notes
Cash flows from financing activities:
Proceeds from issuance of long-term debt	496.6	0.0	0.0
2025 Senior Notes Redeemed
Cash flows from financing activities:
Repayments of long-term debt	(666.2)	0.0	0.0
2028 Senior Notes
Adjustments to reconcile net income to net cash provided by operating activities:
Loss (gain) on extinguishment of debt		(3.6)	(62.4)
Cash flows from financing activities:
Repayments of long-term debt	0.0	(21.1)	(109.3)
2025 Senior Notes Repurchased
Cash flows from financing activities:
Repayments of long-term debt	0.0	(4.8)	(37.5)
2025 Senior Secured Notes
Adjustments to reconcile net income to net cash provided by operating activities:
Loss (gain) on extinguishment of debt		(69.9)
Cash flows from financing activities:
Repayments of long-term debt	0.0	(1,307.4)	0.0
Rail Term Loan
Cash flows from financing activities:
Repayments of long-term debt	0.0	0.0	(7.4)
Collins Pipeline Company And T&M Terminal Company
Cash flows from financing activities:
Payments of capital distribution	0.0	0.0	(0.7)
Members
Cash flows from financing activities:
Payments of capital distribution	$ (1,583.7)	$ (571.4)	$ (2.7)