CONDENSED CONSOLIDATING FINANCIAL STATEMENTS OF PBF HOLDINGS (Balance Sheet) (Details) - USD ($) $ in Millions		Jun. 30, 2019	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017
Current assets:
Cash and cash equivalents		$ 156.8			$ 561.7	$ 442.7		$ 526.2	$ 442.7
Accounts receivable		984.7			710.7
Accounts receivable - affiliate		5.5			12.0
Inventories		2,312.6			1,864.1
Prepaid and other current assets		86.5			52.5
Due from related parties		0.0			0.0
Total current assets		3,546.1			3,201.0
Property, plant and equipment, net		3,063.2			2,971.2
Investment in subsidiaries		0.0			0.0
Investment in equity method investee		0.0			169.5
Operating Lease, Right-of-Use Asset		933.7		$ 853.9
Deferred charges and other assets, net		1,027.7			871.8
Total assets		8,556.5			7,213.5
Current liabilities:
Accounts payable		438.8			483.8
Accounts payable - affiliate		47.3			49.5
Accrued expenses		1,803.1			1,579.0
Operating Lease, Liability, Current		152.6
Current portion of long-term debt	[1]	1.3			2.4
Deferred revenue		22.4			17.1
Due to related parties		0.0			0.0
Total current liabilities		2,465.5			2,131.8
Long-term debt		1,260.2			1,258.0
Deferred tax liabilities		35.1			40.4
Operating Lease, Liability, Noncurrent		766.4
Other long-term liabilities		255.3			253.5
Investment in subsidiaries		0.0
Due to Related Parties, Noncurrent					0.0
Total liabilities		4,782.5			3,683.7
Commitments and contingencies
Equity:
Member’s equity		2,699.8			2,652.5
Retained earnings / (accumulated deficit)		1,086.4			890.3
Accumulated other comprehensive loss		(23.2)			(23.9)
Total PBF Holding Company LLC equity		3,763.0			3,518.9
Noncontrolling interest		11.0			10.9
Total equity		3,774.0	$ 3,825.0		3,529.8	$ 3,589.1	$ 3,219.7	3,183.9
Total liabilities and equity		8,556.5			7,213.5
Consolidation, Eliminations [Member]
Current assets:
Cash and cash equivalents		0.0			0.0			0.0	0.0
Accounts receivable		0.0			0.0
Accounts receivable - affiliate		0.0			0.0
Inventories		0.0			0.0
Prepaid and other current assets		0.0			0.0
Due from related parties		(73,658.9)			(68,384.6)
Total current assets		(73,658.9)			(68,384.6)
Property, plant and equipment, net		0.0			0.0
Investment in subsidiaries		(233.7)			(421.4)
Investment in equity method investee					0.0
Deferred charges and other assets, net		0.0			0.0
Total assets		(73,892.6)			(68,806.0)
Current liabilities:
Accounts payable		0.0			0.0
Accounts payable - affiliate		0.0			0.0
Accrued expenses		0.0			0.0
Current portion of long-term debt		0.0			0.0
Deferred revenue		0.0			0.0
Due to related parties		(73,658.9)			(68,384.6)
Total current liabilities		(73,658.9)			(68,384.6)
Long-term debt		0.0			0.0
Deferred tax liabilities		0.0			0.0
Other long-term liabilities		0.0			0.0
Investment in subsidiaries		(2,854.8)
Due to Related Parties, Noncurrent					(1,938.3)
Total liabilities		(76,513.7)			(70,322.9)
Commitments and contingencies
Equity:
Member’s equity		(1,728.6)			(2,060.9)
Retained earnings / (accumulated deficit)		4,353.2			3,581.2
Accumulated other comprehensive loss		7.5			7.5
Total PBF Holding Company LLC equity		2,632.1			1,527.8
Noncontrolling interest		(11.0)			(10.9)
Total equity		2,621.1			1,516.9
Total liabilities and equity		(73,892.6)			(68,806.0)
Issuer [Member]
Current assets:
Cash and cash equivalents		118.9			526.0			486.6	400.7
Accounts receivable		965.6			690.1
Accounts receivable - affiliate		1.7			1.8
Inventories		2,113.8			1,685.4
Prepaid and other current assets		44.2			20.7
Due from related parties		36,665.2			33,793.1
Total current assets		39,909.4			36,717.1
Property, plant and equipment, net		15.3			17.3
Investment in subsidiaries		0.0			0.0
Investment in equity method investee					0.0
Deferred charges and other assets, net		16.9			16.0
Total assets		40,734.1			36,750.4
Current liabilities:
Accounts payable		279.0			278.2
Accounts payable - affiliate		45.5			34.2
Accrued expenses		1,423.8			1,364.0
Current portion of long-term debt		0.0			0.0
Deferred revenue		20.9			15.6
Due to related parties		30,294.2			28,340.7
Total current liabilities		32,200.0			30,032.7
Long-term debt		1,197.8			1,194.7
Deferred tax liabilities		0.0			0.0
Other long-term liabilities		52.1			54.9
Investment in subsidiaries		2,854.8
Due to Related Parties, Noncurrent					1,938.3
Total liabilities		36,960.1			33,220.6
Commitments and contingencies
Equity:
Member’s equity		2,699.8			2,652.5
Retained earnings / (accumulated deficit)		1,086.4			890.3
Accumulated other comprehensive loss		(23.2)			(23.9)
Total PBF Holding Company LLC equity		3,763.0			3,518.9
Noncontrolling interest		11.0			10.9
Total equity		3,774.0			3,529.8
Total liabilities and equity		40,734.1			36,750.4
Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents		7.9			9.1			13.5	16.2
Accounts receivable		6.8			7.2
Accounts receivable - affiliate		2.8			9.5
Inventories		0.0			0.0
Prepaid and other current assets		40.8			30.0
Due from related parties		25,989.9			25,057.3
Total current assets		26,048.2			25,113.1
Property, plant and equipment, net		2,817.9			2,722.7
Investment in subsidiaries		233.7			421.4
Investment in equity method investee					0.0
Deferred charges and other assets, net		1,010.8			855.8
Total assets		30,237.6			29,113.0
Current liabilities:
Accounts payable		146.9			189.7
Accounts payable - affiliate		1.5			14.8
Accrued expenses		107.0			156.1
Current portion of long-term debt		1.3			2.4
Deferred revenue		1.5			1.5
Due to related parties		32,445.7			30,433.4
Total current liabilities		32,719.9			30,797.9
Long-term debt		44.5			42.0
Deferred tax liabilities		0.0			0.0
Other long-term liabilities		200.1			194.5
Investment in subsidiaries		0.0
Due to Related Parties, Noncurrent					0.0
Total liabilities		33,075.5			31,034.4
Commitments and contingencies
Equity:
Member’s equity		1,582.2			1,737.2
Retained earnings / (accumulated deficit)		(4,423.6)			(3,662.0)
Accumulated other comprehensive loss		(7.5)			(7.5)
Total PBF Holding Company LLC equity		(2,848.9)			(1,932.3)
Noncontrolling interest		11.0			10.9
Total equity		(2,837.9)			(1,921.4)
Total liabilities and equity		30,237.6			29,113.0
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents		30.0			26.6			$ 26.1	$ 25.8
Accounts receivable		12.3			13.4
Accounts receivable - affiliate		1.0			0.7
Inventories		198.8			178.7
Prepaid and other current assets		1.5			1.8
Due from related parties		11,003.8			9,534.2
Total current assets		11,247.4			9,755.4
Property, plant and equipment, net		230.0			231.2
Investment in subsidiaries		0.0			0.0
Investment in equity method investee					169.5
Deferred charges and other assets, net		0.0			0.0
Total assets		11,477.4			10,156.1
Current liabilities:
Accounts payable		12.9			15.9
Accounts payable - affiliate		0.3			0.5
Accrued expenses		272.3			58.9
Current portion of long-term debt		0.0			0.0
Deferred revenue		0.0			0.0
Due to related parties		10,919.0			9,610.5
Total current liabilities		11,204.5			9,685.8
Long-term debt		17.9			21.3
Deferred tax liabilities		35.1			40.4
Other long-term liabilities		3.1			4.1
Investment in subsidiaries		0.0
Due to Related Parties, Noncurrent					0.0
Total liabilities		11,260.6			9,751.6
Commitments and contingencies
Equity:
Member’s equity		146.4			323.7
Retained earnings / (accumulated deficit)		70.4			80.8
Accumulated other comprehensive loss		0.0			0.0
Total PBF Holding Company LLC equity		216.8			404.5
Noncontrolling interest		0.0			0.0
Total equity		216.8			404.5
Total liabilities and equity		11,477.4			10,156.1
Third Party Lease [Member]
Current assets:
Operating Lease, Right-of-Use Asset		236.5			0.0
Current liabilities:
Operating Lease, Liability, Current		80.1			0.0
Operating Lease, Liability, Noncurrent		155.9			0.0
Third Party Lease [Member] | Consolidation, Eliminations [Member]
Current assets:
Operating Lease, Right-of-Use Asset		0.0
Current liabilities:
Operating Lease, Liability, Current		0.0
Operating Lease, Liability, Noncurrent		0.0
Third Party Lease [Member] | Issuer [Member]
Current assets:
Operating Lease, Right-of-Use Asset		174.6
Current liabilities:
Operating Lease, Liability, Current		66.8
Operating Lease, Liability, Noncurrent		107.3
Third Party Lease [Member] | Guarantor Subsidiaries [Member]
Current assets:
Operating Lease, Right-of-Use Asset		61.9
Current liabilities:
Operating Lease, Liability, Current		13.3
Operating Lease, Liability, Noncurrent		48.6
Third Party Lease [Member] | Non-Guarantor Subsidiaries [Member]
Current assets:
Operating Lease, Right-of-Use Asset		0.0
Current liabilities:
Operating Lease, Liability, Current		0.0
Operating Lease, Liability, Noncurrent		0.0
Lease with Affiliate [Member]
Current assets:
Operating Lease, Right-of-Use Asset		683.0		$ 604.4	0.0
Current liabilities:
Operating Lease, Liability, Current		72.5			0.0
Operating Lease, Liability, Noncurrent		610.5			$ 0.0
Lease with Affiliate [Member] | Consolidation, Eliminations [Member]
Current assets:
Operating Lease, Right-of-Use Asset		0.0
Current liabilities:
Operating Lease, Liability, Current		0.0
Operating Lease, Liability, Noncurrent		0.0
Lease with Affiliate [Member] | Issuer [Member]
Current assets:
Operating Lease, Right-of-Use Asset		617.9
Current liabilities:
Operating Lease, Liability, Current		69.8
Operating Lease, Liability, Noncurrent		548.1
Lease with Affiliate [Member] | Guarantor Subsidiaries [Member]
Current assets:
Operating Lease, Right-of-Use Asset		65.1
Current liabilities:
Operating Lease, Liability, Current		2.7
Operating Lease, Liability, Noncurrent		62.4
Lease with Affiliate [Member] | Non-Guarantor Subsidiaries [Member]
Current assets:
Operating Lease, Right-of-Use Asset		0.0
Current liabilities:
Operating Lease, Liability, Current		0.0
Operating Lease, Liability, Noncurrent		$ 0.0

[1] Catalyst leases are valued using a market approach based upon commodity prices for similar instruments quoted in active markets and are categorized as a Level 2 measurement. The Company has elected the fair value option for accounting for its catalyst lease repurchase obligations as the Company’s liability is directly impacted by the change in fair value of the underlying catalyst. During 2018, Toledo Refining and Chalmette Refining entered into two platinum bridge leases which were settled in April 2019 and were not renewed. During 2018 Delaware City Refining entered into a new platinum bridge lease, which will expire in the third quarter of 2019. This lease is payable at maturity and is not anticipated to be renewed. The total outstanding balance related to these bridge leases as of June 30, 2019 and December 31, 2018 was $1.3 million and $2.4 million, respectively, and is included in Current debt in the Company’s Condensed Consolidated Balance Sheets.