Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Class A Common Stock	Class B Common Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interest
Balance, beginning of period (in shares) at Dec. 31, 2022				129,639,307	13				10,937,916
Balance, beginning of period at Dec. 31, 2022	$ 5,056.0			$ 0.1	$ 0.0	$ 3,201.6	$ 2,056.0	$ (1.5)	$ (327.0)	$ 126.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	2,209.8						2,188.9			21.5
Distributions to PBF Energy Company LLC members	5.0									5.0
Dividends	(76.0)						(76.0)
Stock-based compensation expense	19.8					19.8
Transactions in connection with stock-based compensation plans (in shares)				2,410,550
Transactions in connection with stock-based compensation plans	42.4					42.4
Treasury stock purchases (in shares)				9,063,571					(9,063,571)
Treasury stock purchases	(385.3)					1.2			$ (386.5)
Other	0.1					(0.1)
Balance, end of period (in shares) at Sep. 30, 2023				122,986,286	13				20,001,487
Balance, end of period at Sep. 30, 2023	6,861.8			$ 0.1	$ 0.0	3,265.1	4,168.9	(2.1)	$ (713.5)	143.3
Balance, beginning of period (in shares) at Jun. 30, 2023				124,002,726	13				17,679,441
Balance, beginning of period at Jun. 30, 2023	6,183.3			$ 0.1	$ 0.0	3,237.0	3,407.2	(1.5)	$ (597.9)	138.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	793.5						786.4	(0.6)		7.7
Distributions to PBF Energy Company LLC members	2.8									2.8
Dividends	(24.7)						(24.7)
Stock-based compensation expense	6.1					6.1
Transactions in connection with stock-based compensation plans (in shares)				1,305,606
Transactions in connection with stock-based compensation plans	22.0					22.0
Treasury stock purchases (in shares)				(2,322,046)					(2,322,046)
Treasury stock purchases	(115.6)								$ (115.6)
Balance, end of period (in shares) at Sep. 30, 2023				122,986,286	13				20,001,487
Balance, end of period at Sep. 30, 2023	6,861.8			$ 0.1	$ 0.0	3,265.1	4,168.9	(2.1)	$ (713.5)	143.3
Balance, beginning of period (in shares) at Dec. 31, 2023		120,440,620	12	120,440,620	12				23,419,532
Balance, beginning of period at Dec. 31, 2023	6,631.3			$ 0.1	$ 0.0	3,278.8	4,089.9	(12.3)	$ (868.2)	143.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(246.1)						(244.5)	1.5		(3.1)
Distributions to PBF Energy Company LLC members	(1.4)									(1.4)
Dividends	(88.3)						(88.3)
Stock-based compensation expense	20.7					20.7
Transactions in connection with stock-based compensation plans (in shares)				1,595,480
Transactions in connection with stock-based compensation plans	24.3					24.3
Exchange of PBF Energy Company LLC Series A Units for PBF Energy Class A common stock	0.0					0.6				(0.6)
Treasury stock purchases (in shares)				6,912,642					(6,912,642)
Treasury stock purchases	(320.9)								$ (320.9)
Balance, end of period (in shares) at Sep. 30, 2024		115,123,458	12	115,123,458	12				30,332,174
Balance, end of period at Sep. 30, 2024	6,019.6			$ 0.1	$ 0.0	3,324.4	3,757.1	(10.8)	$ (1,189.1)	137.9
Balance, beginning of period (in shares) at Jun. 30, 2024				117,148,630	12				28,290,610
Balance, beginning of period at Jun. 30, 2024	6,406.4			$ 0.1	$ 0.0	3,318.2	4,071.9	(11.8)	$ (1,113.3)	141.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(288.1)						(285.9)	1.0		(3.2)
Distributions to PBF Energy Company LLC members	(0.2)									(0.2)
Dividends	(28.9)						(28.9)
Stock-based compensation expense	5.8					5.8
Transactions in connection with stock-based compensation plans (in shares)				16,392
Transactions in connection with stock-based compensation plans	0.4					0.4
Treasury stock purchases (in shares)				(2,041,564)					(2,041,564)
Treasury stock purchases	(75.8)								$ (75.8)
Balance, end of period (in shares) at Sep. 30, 2024		115,123,458	12	115,123,458	12				30,332,174
Balance, end of period at Sep. 30, 2024	$ 6,019.6			$ 0.1	$ 0.0	$ 3,324.4	$ 3,757.1	$ (10.8)	$ (1,189.1)	$ 137.9