RELATED PARTY TRANSACTIONS (Summary of Transactions with PBFX) (Details) - PBF Logistics LP [Member] - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
General and Administrative Expense [Member] \| Services Agreement [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ 8.6	$ 7.5	$ 6.6
General and Administrative Expense [Member] \| Omnibus Agreement [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	7.7	7.5	6.9
Cost of Sales [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ 300.9	$ 259.4	$ 240.7

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
-Paragraph 1
-Subparagraph (c)
-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
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864

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

Name:	us-gaap_RelatedPartyTransactionAmountsOfTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration