RELATED PARTY TRANSACTIONS (Summary of Transactions with PBFX) (Details) - PBF Logistics LP [Member] - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
General and Administrative Expense [Member] \| Services Agreement [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ 8.7	$ 8.6	$ 7.5
General and Administrative Expense [Member] \| Omnibus Agreement [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	7.6	7.7	7.5
Cost of Sales [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ 289.4	$ 300.9	$ 259.4

Amount of transactions with related party during the financial reporting period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

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