Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	IEP Energy Holding LLC	Common Stock	Common Stock IEP Energy Holding LLC	Additional Paid-in Capital	Additional Paid-in Capital IEP Energy Holding LLC	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained Earnings IEP Energy Holding LLC	Treasury Shares	Non-Controlling Interest in Subsidiaries
Beginning balance (in shares) at Dec. 31, 2021			91,772,080
Beginning balance at Dec. 31, 2021	$ 1,014.0		$ 0.9		$ 1,206.5		$ (3.8)	$ 384.7		$ (694.1)	$ 119.8
Beginning balance (in shares) at Dec. 31, 2021										(17,575,527)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	290.5							257.1			33.4
Other comprehensive gain (loss) related to postretirement benefit plans, net	(1.4)						(1.4)
Common stock dividends	(42.8)							(42.8)
Equity-based compensation expense	29.1				28.6						0.5
Distributions to non-controlling interests	(36.0)										(36.0)
Repurchase of common stock (in shares)			(4,261,185)	(3,497,268)
Repurchase of common stock	(129.6)	$ (64.0)			(56.9)	$ (46.0)		(72.7)	$ (18.0)
Sale of Delek Logistics common limited partner units, net	13.6				8.5						5.1
Issuance of Delek Logistic common limited partner units, net	3.1										3.1
Taxes paid due to the net settlement of equity-based compensation	$ (6.5)				(6.5)
Exercise of equity-based awards (in shares)	457,405		457,405
Other (in shares)			38,485
Other	$ (0.5)				(0.1)			(0.4)
Ending balance (in shares) at Dec. 31, 2022			84,509,517
Ending balance at Dec. 31, 2022	1,069.5		$ 0.9		1,134.1		(5.2)	507.9		$ (694.1)	125.9
Ending balance (in shares) at Dec. 31, 2022										(17,575,527)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	46.7							19.8			26.9
Other comprehensive gain (loss) related to postretirement benefit plans, net	0.4						0.4
Common stock dividends	(60.3)							(60.3)
Equity-based compensation expense	27.5				26.8						0.7
Distributions to non-controlling interests	(38.6)										(38.6)
Repurchase of common stock (in shares)			(3,562,767)
Repurchase of common stock	(85.4)		$ (0.1)		(48.1)			(37.2)
Taxes paid due to the net settlement of equity-based compensation	$ (5.2)				(4.5)						(0.7)
Exercise of equity-based awards (in shares)	450,123		450,123
Other (in shares)			142,998
Other	$ 5.1				5.3			(0.2)
Ending balance (in shares) at Dec. 31, 2023			81,539,871
Ending balance at Dec. 31, 2023	$ 959.7		$ 0.8		1,113.6		(4.8)	430.0		$ (694.1)	114.2
Ending balance (in shares) at Dec. 31, 2023	(17,575,527)									(17,575,527)
Redeemable non-controlling interest, ending balance at Dec. 31, 2023	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(520.9)							(560.4)			39.5
Other comprehensive gain (loss) related to postretirement benefit plans, net	0.7						0.7
Common stock dividends	(64.2)							(64.2)
Equity-based compensation expense	33.8				32.6						1.2
Distributions to non-controlling interests	(56.8)										(56.8)
Repurchase of common stock (in shares)			(2,168,196)
Repurchase of common stock	(41.5)				(31.7)			(9.8)
Taxes paid due to the net settlement of equity-based compensation	$ (6.5)				(5.5)						(1.0)
Exercise of equity-based awards (in shares)	589,300		589,300
Equity attributable to issuance of Delek Logistics common limited partner units, net of tax	$ 269.5				103.9						165.6
Redemption of Delek Logistics preferred units	(0.8)							(0.8)
Other (in shares)			167,019
Other	2.2				3.0			(0.5)			(0.3)
Ending balance (in shares) at Dec. 31, 2024			80,127,994
Ending balance at Dec. 31, 2024	$ 575.2		$ 0.8		$ 1,215.9		$ (4.1)	$ (205.7)		$ (694.1)	$ 262.4
Ending balance (in shares) at Dec. 31, 2024	(17,575,527)									(17,575,527)
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Delek Logistics preferred units	$ 70.0
Redemption of Delek Logistics preferred units	(70.0)
Redeemable non-controlling interest, ending balance at Dec. 31, 2024	$ 0.0