CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net income (loss)	$ (895.9)	$ 1,803.8	$ 3,708.9
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization	600.7	551.6	495.6
Stock-based compensation	44.3	51.5	44.1
Change in fair value of catalyst obligations	0.0	(1.1)	2.0
Deferred income taxes	(5.9)	3.7	(3.2)
Non-cash change in inventory repurchase obligations	0.0	0.0	(5.4)
Change in fair value of contingent consideration, net	(3.3)	(45.8)	48.1
Loss on extinguishment of debt	0.0	5.7	66.1
Pension and other post-retirement benefit costs	51.9	47.9	47.6
Loss (gain) on sale of assets	0.4	(1.3)	0.9
Changes in operating assets and liabilities:
Accounts receivable	195.1	115.5	(179.6)
Due to/from affiliates	17.8	12.7	(25.7)
Inventories	587.9	(334.1)	(258.5)
Prepaid and other current assets	16.6	(11.2)	(5.0)
Accounts payable	(199.4)	125.9	(97.7)
Accrued expenses	(486.9)	(764.9)	860.8
Deferred revenue	(20.3)	26.1	(2.8)
Other assets and liabilities	(39.8)	(108.0)	0.0
Net cash (used in) provided by operating activities	(136.8)	1,478.0	4,696.2
Cash flows from investing activities:
Expenditures for property, plant and equipment	(384.4)	(647.7)	(625.4)
Expenditures for deferred turnaround costs	(576.7)	(473.5)	(311.6)
Expenditures for other assets	(40.7)	(40.5)	(66.0)
Proceeds from sale of assets	0.0	4.4	0.0
Net cash used in investing activities	(1,001.8)	(1,157.3)	(1,003.0)
Cash flows from financing activities:
Contributions from PBF LLC	245.0	1,159.6	56.4
Distributions to members	(551.0)	(1,583.7)	(571.4)
Proceeds from revolver borrowings	200.0	0.0	400.0
Repayments of revolver borrowings	0.0	0.0	(1,300.0)
Settlements of precious metal catalyst obligations	0.0	(3.1)	(56.2)
Payments on financing leases	(12.2)	(14.1)	(11.3)
Proceeds from insurance premium financing	123.2	13.0	2.1
Payments of insurance premium financing	(111.9)	0.0	0.0
Payments of contingent consideration	0.0	(80.1)	0.0
Deferred financing costs and other	(0.1)	(35.8)	(31.3)
Net cash used in financing activities	(107.0)	(713.8)	(2,845.0)
Net change in cash and cash equivalents	(1,245.6)	(393.1)	848.2
Cash and cash equivalents, beginning of period	1,760.8	2,153.9	1,305.7
Cash and cash equivalents, end of period	515.2	1,760.8	2,153.9
Non-cash activities:
Distribution of assets to PBF Energy Company LLC	(8.8)	(853.4)	0.0
Accrued and unpaid capital expenditures	81.9	143.5	165.2
Assets acquired or remeasured under operating and financing leases	333.1	335.4	82.8
Cash paid during the year for:
Interest (net of capitalized interest of $18.5, $38.0 and $24.8 in 2024, 2023 and 2022, respectively)	93.2	95.5	211.5
Income taxes	0.8	1.6	0.8
2030 Senior Notes
Cash flows from financing activities:
Proceeds from issuance of long-term debt	0.0	496.6	0.0
2025 Senior Notes Redeemed
Cash flows from financing activities:
Repayments of long-term debt	0.0	(666.2)	0.0
2028 Senior Notes
Cash flows from financing activities:
Repayments of long-term debt	0.0	0.0	(21.1)
2025 Senior Notes Repurchased
Cash flows from financing activities:
Repayments of long-term debt	0.0	0.0	(4.8)
2025 Senior Secured Notes
Cash flows from financing activities:
Repayments of long-term debt	$ 0.0	$ 0.0	$ (1,307.4)