CONDENSED CONSOLIDATING FINANCIAL STATEMENTS OF PBF HOLDINGS (Balance Sheet) (Details) - USD ($) $ in Millions		Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017
Current assets:
Cash and cash equivalents		$ 384.6		$ 561.7	$ 315.8	$ 526.2	$ 315.8
Accounts receivable		863.4		710.7
Accounts receivable - affiliate		4.7		12.0
Inventories		2,564.8		1,864.1
Prepaid and other current assets		122.4		52.5
Due from related parties		0.0		0.0
Total current assets		3,939.9		3,201.0
Property, plant and equipment, net		3,014.3		2,971.2
Investment in subsidiaries		0.0		0.0
Investment in equity method investee		167.7		169.5
Operating Lease, Right-of-Use Asset		900.7	$ 853.9
Deferred charges and other assets, net		998.2		871.8
Total assets		9,020.8		7,213.5
Current liabilities:
Accounts payable		546.0		483.8
Accounts payable - affiliate		43.9		49.5
Accrued expenses		1,843.7		1,579.0
Operating Lease, Liability, Current		154.2
Current portion of long-term debt	[1]	2.5		2.4
Deferred revenue		63.6		17.1
Due to related parties		0.0		0.0
Total current liabilities		2,653.9		2,131.8
Long-term debt		1,510.7		1,258.0
Deferred tax liabilities		33.2		40.4
Operating Lease, Liability, Noncurrent		747.0
Investment in subsidiaries		0.0
Other long-term liabilities		251.0		253.5
Due to Related Parties, Noncurrent				0.0
Total liabilities		5,195.8		3,683.7
Commitments and contingencies
Equity:
Member’s equity		2,658.4		2,652.5
Retained earnings / (accumulated deficit)		1,179.4		890.3
Accumulated other comprehensive loss		(23.7)		(23.9)
Total PBF Holding Company LLC equity		3,814.1		3,518.9
Noncontrolling interest		10.9		10.9
Total equity		3,825.0		3,529.8	$ 3,219.7	3,183.9
Total liabilities and equity		9,020.8		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		(70,641.6)		(68,384.6)
Total current assets		(70,641.6)		(68,384.6)
Property, plant and equipment, net		0.0		0.0
Investment in subsidiaries		(397.0)		(421.4)
Investment in equity method investee		0.0		0.0
Deferred charges and other assets, net		0.0		0.0
Total assets		(71,038.6)		(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		(70,641.6)		(68,384.6)
Total current liabilities		(70,641.6)		(68,384.6)
Long-term debt		0.0		0.0
Deferred tax liabilities		0.0		0.0
Investment in subsidiaries		(2,381.2)
Other long-term liabilities		0.0		0.0
Due to Related Parties, Noncurrent				(1,938.3)
Total liabilities		(73,022.8)		(70,322.9)
Commitments and contingencies
Equity:
Member’s equity		(2,060.3)		(2,060.9)
Retained earnings / (accumulated deficit)		4,047.9		3,581.2
Accumulated other comprehensive loss		7.5		7.5
Total PBF Holding Company LLC equity		1,995.1		1,527.8
Noncontrolling interest		(10.9)		(10.9)
Total equity		1,984.2		1,516.9
Total liabilities and equity		(71,038.6)		(68,806.0)
Issuer [Member]
Current assets:
Cash and cash equivalents		342.1		526.0		486.6	283.4
Accounts receivable		838.5		690.1
Accounts receivable - affiliate		1.4		1.8
Inventories		2,368.6		1,685.4
Prepaid and other current assets		63.5		20.7
Due from related parties		35,050.5		33,793.1
Total current assets		38,664.6		36,717.1
Property, plant and equipment, net		16.8		17.3
Investment in subsidiaries		0.0		0.0
Investment in equity method investee		0.0		0.0
Deferred charges and other assets, net		13.4		16.0
Total assets		39,465.8		36,750.4
Current liabilities:
Accounts payable		310.9		278.2
Accounts payable - affiliate		43.2		34.2
Accrued expenses		1,453.7		1,364.0
Current portion of long-term debt		0.0		0.0
Deferred revenue		62.1		15.6
Due to related parties		29,119.6		28,340.7
Total current liabilities		31,127.2		30,032.7
Long-term debt		1,446.2		1,194.7
Deferred tax liabilities		0.0		0.0
Investment in subsidiaries		2,381.2
Other long-term liabilities		53.1		54.9
Due to Related Parties, Noncurrent				1,938.3
Total liabilities		35,640.8		33,220.6
Commitments and contingencies
Equity:
Member’s equity		2,658.4		2,652.5
Retained earnings / (accumulated deficit)		1,179.4		890.3
Accumulated other comprehensive loss		(23.7)		(23.9)
Total PBF Holding Company LLC equity		3,814.1		3,518.9
Noncontrolling interest		10.9		10.9
Total equity		3,825.0		3,529.8
Total liabilities and equity		39,465.8		36,750.4
Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents		12.8		9.1		13.5	10.7
Accounts receivable		7.0		7.2
Accounts receivable - affiliate		2.6		9.5
Inventories		0.0		0.0
Prepaid and other current assets		57.2		30.0
Due from related parties		25,514.7		25,057.3
Total current assets		25,594.3		25,113.1
Property, plant and equipment, net		2,767.5		2,722.7
Investment in subsidiaries		397.0		421.4
Investment in equity method investee		0.0		0.0
Deferred charges and other assets, net		984.8		855.8
Total assets		29,873.3		29,113.0
Current liabilities:
Accounts payable		223.0		189.7
Accounts payable - affiliate		0.7		14.8
Accrued expenses		143.5		156.1
Current portion of long-term debt		2.5		2.4
Deferred revenue		1.5		1.5
Due to related parties		31,496.3		30,433.4
Total current liabilities		31,884.0		30,797.9
Long-term debt		44.9		42.0
Deferred tax liabilities		0.0		0.0
Investment in subsidiaries		0.0
Other long-term liabilities		194.8		194.5
Due to Related Parties, Noncurrent				0.0
Total liabilities		32,237.6		31,034.4
Commitments and contingencies
Equity:
Member’s equity		1,743.2		1,737.2
Retained earnings / (accumulated deficit)		(4,110.9)		(3,662.0)
Accumulated other comprehensive loss		(7.5)		(7.5)
Total PBF Holding Company LLC equity		(2,375.2)		(1,932.3)
Noncontrolling interest		10.9		10.9
Total equity		(2,364.3)		(1,921.4)
Total liabilities and equity		29,873.3		29,113.0
Non-Guarantor Subsidiaries [Member]
Current assets:
Cash and cash equivalents		29.7		26.6		$ 26.1	$ 21.7
Accounts receivable		17.9		13.4
Accounts receivable - affiliate		0.7		0.7
Inventories		196.2		178.7
Prepaid and other current assets		1.7		1.8
Due from related parties		10,076.4		9,534.2
Total current assets		10,322.6		9,755.4
Property, plant and equipment, net		230.0		231.2
Investment in subsidiaries		0.0		0.0
Investment in equity method investee		167.7		169.5
Deferred charges and other assets, net		0.0		0.0
Total assets		10,720.3		10,156.1
Current liabilities:
Accounts payable		12.1		15.9
Accounts payable - affiliate		0.0		0.5
Accrued expenses		246.5		58.9
Current portion of long-term debt		0.0		0.0
Deferred revenue		0.0		0.0
Due to related parties		10,025.7		9,610.5
Total current liabilities		10,284.3		9,685.8
Long-term debt		19.6		21.3
Deferred tax liabilities		33.2		40.4
Investment in subsidiaries		0.0
Other long-term liabilities		3.1		4.1
Due to Related Parties, Noncurrent				0.0
Total liabilities		10,340.2		9,751.6
Commitments and contingencies
Equity:
Member’s equity		317.1		323.7
Retained earnings / (accumulated deficit)		63.0		80.8
Accumulated other comprehensive loss		0.0		0.0
Total PBF Holding Company LLC equity		380.1		404.5
Noncontrolling interest		0.0		0.0
Total equity		380.1		404.5
Total liabilities and equity		10,720.3		10,156.1
Third Party Lease [Member]
Current assets:
Operating Lease, Right-of-Use Asset		245.1		0.0
Current liabilities:
Operating Lease, Liability, Current		80.9		0.0
Operating Lease, Liability, Noncurrent		164.7		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		181.1
Current liabilities:
Operating Lease, Liability, Current		67.1
Operating Lease, Liability, Noncurrent		113.9
Third Party Lease [Member] | Guarantor Subsidiaries [Member]
Current assets:
Operating Lease, Right-of-Use Asset		64.0
Current liabilities:
Operating Lease, Liability, Current		13.8
Operating Lease, Liability, Noncurrent		50.8
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		655.6	$ 604.4	0.0
Current liabilities:
Operating Lease, Liability, Current		73.3		0.0
Operating Lease, Liability, Noncurrent		582.3		$ 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		589.9
Current liabilities:
Operating Lease, Liability, Current		70.6
Operating Lease, Liability, Noncurrent		519.2
Lease with Affiliate [Member] | Guarantor Subsidiaries [Member]
Current assets:
Operating Lease, Right-of-Use Asset		65.7
Current liabilities:
Operating Lease, Liability, Current		2.7
Operating Lease, Liability, Noncurrent		63.1
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 Delaware City Refining entered into a new platinum bridge lease, which will expire in the second quarter of 2019. These leases are payable at maturity and are not anticipated to be renewed. The total outstanding balance related to these bridge leases as of March 31, 2019 and December 31, 2018 was $2.5 million and $2.4 million, respectively, and is included in Current debt in the Company’s Condensed Consolidated Balance Sheets.