STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-Based Payment Awards, Performance Awards, Valuation Assumptions [Table Text Block]

The performance share awards are accounted for as equity awards, for which the fair value was determined on the grant date by application of a Monte Carlo valuation model.

The grant date fair value was calculated using a Monte Carlo valuation model with the following assumptions:

	December 31, 2019		December 31, 2018
Expected life (in years)	2.17 - 2.88		2.17
Expected volatility	37.19% - 41.70%		39.04		%
Dividend yield	3.40% - 3.67%		2.95		%
Risk-free rate of return	1.66% - 2.51%		2.89		%
Weighted average fair value per PSU	$	27.99	$	50.23

Schedule of stock-based compensation expense

Stock-based compensation expense included in general and administrative expenses consisted of the following:

	Years Ended December 31,
(in millions)	2019		2018		2017
PBF Energy options	$	15.8	$	11.5	$	9.4
PBF Energy restricted shares	6.5		7.5		12.1
PBF Energy performance awards	8.2		1.2		—
PBFX phantom units	6.8		5.8		5.3
	$	37.3	$	26.0	$	26.8

Weighted average assumptions

The Black-Scholes option-pricing model values used to value stock option awards granted were determined based on the following weighted average assumptions: 

	December 31, 2019			December 31, 2018			December 31, 2017
Expected life (in years)	6.25			6.25			6.25
Expected volatility	38.6		%	35.8		%	39.5		%
Dividend yield	3.54		%	3.49		%	4.58		%
Risk-free rate of return	2.16		%	2.82		%	2.09		%
Exercise price	$	34.11		$	35.25		$	26.52

PBF Energy [Member] | Performance share units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Share-based compensation activity

The following table summarizes activity for PBF Energy performance share awards:

	Number of PBF Energy PSUs	Weighted Average Grant Date Fair Value
Nonvested at January 1, 2018	—	$	—
Granted	179,072	50.23
Forfeited	—	—
Nonvested at December 31, 2018	179,072	$	50.23
Granted	181,725	27.99
Forfeited	—	—
Nonvested at December 31, 2019	360,797	$	39.03

PBF Energy [Member] | Employee Stock Option [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Share-based compensation activity

The following table summarizes activity for PBF Energy options for the years ended December 31, 2019, 2018 and 2017.

	Number of PBF Energy Class A Common Stock Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)
Stock-based awards, outstanding at January 1, 2017	5,970,625		$	27.37	8.02
Granted	1,638,075		26.52		10.00
Exercised	(462,500	)	25.65		—
Forfeited	(263,425	)	27.71		—
Outstanding at December 31, 2017	6,882,775		$	27.27	7.82
Granted	2,500,742		35.25		10.00
Exercised	(884,878	)	27.57		—
Forfeited	(141,981	)	33.49		—
Outstanding at December 31, 2018	8,356,658		$	29.60	7.48
Granted	1,899,909		34.11		10.00
Exercised	(49,656	)	24.23		—
Forfeited	(132,995	)	31.65		—
Outstanding at December 31, 2019	10,073,916		$	30.47	7.17
Exercisable and vested at December 31, 2019	5,345,051		$	28.37	5.94
Exercisable and vested at December 31, 2018	3,531,066		$	27.39	6.27
Exercisable and vested at December 31, 2017	2,958,875		$	27.58	6.77
Expected to vest at December 31, 2019	10,073,916		$	30.47	7.17

PBF Energy [Member] | Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Share-based compensation activity

The following table summarizes activity for PBF Energy restricted stock:

	Number of PBF Energy Restricted Class A Common Stock		Weighted Average Grant Date Fair Value
Nonvested at January 1, 2017	521,369		$	24.89
Granted	762,425		25.86
Vested	(172,978	)	24.99
Forfeited	(15,100	)	24.18
Nonvested at December 31, 2017	1,095,716		$	25.56
Granted	58,830		47.24
Vested	(345,073	)	26.13
Forfeited	(15,519	)	24.18
Nonvested at December 31, 2018	793,954		$	26.88
Granted	58,324		28.20
Vested	(356,204	)	26.68
Forfeited	(3,849	)	24.18
Nonvested at December 31, 2019	492,225		$	27.21

PBF Energy [Member] | Performance Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Share-based compensation activity

The following table summarizes activity for PBF Energy performance unit awards:

	Number of PBF Energy Performance Units (in equivalent $’s)
Nonvested at January 1, 2018	—
Granted	7,279,188
Forfeited	—
Nonvested at December 31, 2018	7,279,188
Granted	7,751,658
Forfeited	—
Nonvested at December 31, 2019	15,030,846

PBFX [Member] | Phantom Share Units (PSUs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Share-based compensation activity

A summary of PBFX’s unit award activity for the years ended December 31, 2019, 2018 and 2017 is set forth below:

	Number of Phantom Units		Weighted Average Grant Date Fair Value
Nonvested at January 1, 2017	564,880		$	22.47
Granted	319,940		20.97
Vested	(217,171	)	23.15
Forfeited	(24,875	)	21.23
Nonvested at December 31, 2017	642,774		$	21.54
Granted	328,052		19.95
Vested	(233,993	)	22.71
Forfeited	(20,125	)	18.81
Nonvested at December 31, 2018	716,708		$	20.53
Granted	343,848		21.39
Vested	(292,341	)	20.20
Forfeited	(6,375	)	20.31
Nonvested at December 31, 2019	761,840		$	20.77