CONDENSED CONSOLIDATING FINANCIAL STATEMENTS OF PBF HOLDINGS (Balance Sheet) (Details) - USD ($) $ in Millions		Sep. 30, 2019	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents		$ 467.3			$ 561.7	$ 1,013.4		$ 526.2
Accounts receivable		873.6			710.7
Accounts receivable - affiliate		8.2			12.0
Inventories		2,130.4			1,864.1
Prepaid and other current assets		51.5			52.5
Due from related parties		0.0			0.0
Total current assets		3,531.0			3,201.0
Property, plant and equipment, net		3,119.4			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		1,011.0		$ 853.9
Deferred charges and other assets, net		981.8			871.8
Total assets		8,629.4			7,213.5
Current liabilities:
Accounts payable		514.6			483.8
Accounts payable - affiliate		66.4			49.5
Accrued expenses		1,642.6			1,579.0
Operating Lease, Liability, Current		153.8
Current portion of long-term debt	[1]	0.0			2.4
Deferred revenue		10.1			17.1
Due to related parties		0.0			0.0
Total current liabilities		2,387.5			2,131.8
Long-term debt		1,262.7			1,258.0
Deferred tax liabilities		32.9			40.4
Operating Lease, Liability, Noncurrent		842.3
Other long-term liabilities		254.0			253.5
Investment in subsidiaries		0.0
Due to Related Parties, Noncurrent					0.0
Total liabilities		4,779.4			3,683.7
Commitments and contingencies
Equity:
Member’s equity		2,732.2			2,652.5
Retained earnings / (accumulated deficit)		1,129.6			890.3
Accumulated other comprehensive loss		(22.8)			(23.9)
Total PBF Holding Company LLC equity		3,839.0			3,518.9
Noncontrolling interest		11.0			10.9
Total equity		3,850.0	$ 3,774.0		3,529.8	4,061.4	$ 3,589.1	3,183.9
Total liabilities and equity		8,629.4			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		(76,084.9)			(68,384.6)
Total current assets		(76,084.9)			(68,384.6)
Property, plant and equipment, net		0.0			0.0
Investment in subsidiaries		(231.6)			(421.4)
Investment in equity method investee					0.0
Deferred charges and other assets, net		0.0			0.0
Total assets		(76,316.5)			(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
Deferred revenue		0.0			0.0
Due to related parties		(76,084.9)			(68,384.6)
Total current liabilities		(76,084.9)			(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		(3,188.1)
Due to Related Parties, Noncurrent					(1,938.3)
Total liabilities		(79,273.0)			(70,322.9)
Commitments and contingencies
Equity:
Member’s equity		(1,734.8)			(2,060.9)
Retained earnings / (accumulated deficit)		4,694.8			3,581.2
Accumulated other comprehensive loss		7.5			7.5
Total PBF Holding Company LLC equity		2,967.5			1,527.8
Noncontrolling interest		(11.0)			(10.9)
Total equity		2,956.5			1,516.9
Total liabilities and equity		(76,316.5)			(68,806.0)
Issuer [Member]
Current assets:
Cash and cash equivalents		438.6			526.0	971.4		486.6
Accounts receivable		841.5			690.1
Accounts receivable - affiliate		0.8			1.8
Inventories		1,900.1			1,685.4
Prepaid and other current assets		16.3			20.7
Due from related parties		37,934.7			33,793.1
Total current assets		41,132.0			36,717.1
Property, plant and equipment, net		16.0			17.3
Investment in subsidiaries		0.0			0.0
Investment in equity method investee					0.0
Deferred charges and other assets, net		16.4			16.0
Total assets		41,937.7			36,750.4
Current liabilities:
Accounts payable		363.2			278.2
Accounts payable - affiliate		64.6			34.2
Accrued expenses		1,247.5			1,364.0
Current portion of long-term debt					0.0
Deferred revenue		8.5			15.6
Due to related parties		31,193.2			28,340.7
Total current liabilities		33,018.9			30,032.7
Long-term debt		1,199.3			1,194.7
Deferred tax liabilities		0.0			0.0
Other long-term liabilities		51.0			54.9
Investment in subsidiaries		3,188.1
Due to Related Parties, Noncurrent					1,938.3
Total liabilities		38,087.7			33,220.6
Commitments and contingencies
Equity:
Member’s equity		2,732.2			2,652.5
Retained earnings / (accumulated deficit)		1,129.6			890.3
Accumulated other comprehensive loss		(22.8)			(23.9)
Total PBF Holding Company LLC equity		3,839.0			3,518.9
Noncontrolling interest		11.0			10.9
Total equity		3,850.0			3,529.8
Total liabilities and equity		41,937.7			36,750.4
Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents		7.3			9.1	16.0		13.5
Accounts receivable		5.8			7.2
Accounts receivable - affiliate		6.5			9.5
Inventories		0.0			0.0
Prepaid and other current assets		34.0			30.0
Due from related parties		26,446.0			25,057.3
Total current assets		26,499.6			25,113.1
Property, plant and equipment, net		2,866.5			2,722.7
Investment in subsidiaries		231.6			421.4
Investment in equity method investee					0.0
Deferred charges and other assets, net		965.4			855.8
Total assets		30,787.0			29,113.0
Current liabilities:
Accounts payable		129.9			189.7
Accounts payable - affiliate		1.5			14.8
Accrued expenses		124.6			156.1
Current portion of long-term debt					2.4
Deferred revenue		1.6			1.5
Due to related parties		33,229.7			30,433.4
Total current liabilities		33,499.2			30,797.9
Long-term debt		47.2			42.0
Deferred tax liabilities		0.0			0.0
Other long-term liabilities		199.9			194.5
Investment in subsidiaries		0.0
Due to Related Parties, Noncurrent					0.0
Total liabilities		33,958.2			31,034.4
Commitments and contingencies
Equity:
Member’s equity		1,588.5			1,737.2
Retained earnings / (accumulated deficit)		(4,763.2)			(3,662.0)
Accumulated other comprehensive loss		(7.5)			(7.5)
Total PBF Holding Company LLC equity		(3,182.2)			(1,932.3)
Noncontrolling interest		11.0			10.9
Total equity		(3,171.2)			(1,921.4)
Total liabilities and equity		30,787.0			29,113.0
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents		21.4			26.6	$ 26.0		$ 26.1
Accounts receivable		26.3			13.4
Accounts receivable - affiliate		0.9			0.7
Inventories		230.3			178.7
Prepaid and other current assets		1.2			1.8
Due from related parties		11,704.2			9,534.2
Total current assets		11,984.3			9,755.4
Property, plant and equipment, net		236.9			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		12,221.2			10,156.1
Current liabilities:
Accounts payable		21.5			15.9
Accounts payable - affiliate		0.3			0.5
Accrued expenses		270.5			58.9
Current portion of long-term debt					0.0
Deferred revenue		0.0			0.0
Due to related parties		11,662.0			9,610.5
Total current liabilities		11,954.3			9,685.8
Long-term debt		16.2			21.3
Deferred tax liabilities		32.9			40.4
Other long-term liabilities		3.1			4.1
Investment in subsidiaries		0.0
Due to Related Parties, Noncurrent					0.0
Total liabilities		12,006.5			9,751.6
Commitments and contingencies
Equity:
Member’s equity		146.3			323.7
Retained earnings / (accumulated deficit)		68.4			80.8
Accumulated other comprehensive loss		0.0			0.0
Total PBF Holding Company LLC equity		214.7			404.5
Noncontrolling interest		0.0			0.0
Total equity		214.7			404.5
Total liabilities and equity		12,221.2			10,156.1
Third Party Lease [Member]
Current assets:
Operating Lease, Right-of-Use Asset		331.0			0.0
Current liabilities:
Operating Lease, Liability, Current		78.1			0.0
Operating Lease, Liability, Noncurrent		251.9			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		171.6
Current liabilities:
Operating Lease, Liability, Current		69.0
Operating Lease, Liability, Noncurrent		101.6
Third Party Lease [Member] | Guarantor Subsidiaries [Member]
Current assets:
Operating Lease, Right-of-Use Asset		159.4
Current liabilities:
Operating Lease, Liability, Current		9.1
Operating Lease, Liability, Noncurrent		150.3
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		666.2		$ 604.4	0.0
Current liabilities:
Operating Lease, Liability, Current		75.7			0.0
Operating Lease, Liability, Noncurrent		590.4			$ 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		601.7
Current liabilities:
Operating Lease, Liability, Current		72.9
Operating Lease, Liability, Noncurrent		528.8
Lease with Affiliate [Member] | Guarantor Subsidiaries [Member]
Current assets:
Operating Lease, Right-of-Use Asset		64.5
Current liabilities:
Operating Lease, Liability, Current		2.8
Operating Lease, Liability, Noncurrent		61.6
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.