Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Net revenues	$ 2,887.0	$ 3,042.4	$ 8,293.5	$ 9,478.5
Cost of sales:
Cost of materials and other	2,165.7	2,788.7	6,980.2	8,547.1
Operating expenses (excluding depreciation and amortization presented below)	227.8	181.4	648.7	580.3
Depreciation and amortization	95.8	92.5	278.4	259.6
Total cost of sales	2,489.3	3,062.6	7,907.3	9,387.0
Operating expenses related to wholesale business (excluding depreciation and amortization presented below)	3.5	3.7	7.0	5.7
General and administrative expenses	76.8	70.4	214.9	191.6
Depreciation and amortization	5.5	5.6	18.3	18.6
Asset impairment	16.3	9.2	16.3	31.3
Other operating (income) expense net	(0.1)	12.8	(6.7)	(67.6)
Total operating costs and expenses	2,591.3	3,164.3	8,157.1	9,566.6
Operating income (loss)	295.7	(121.9)	136.4	(88.1)
Interest expense, net	93.1	78.8	263.1	244.1
Income from equity method investments	(31.2)	(25.1)	(66.7)	(77.4)
Other (income) expense, net	(1.2)	(0.5)	3.4	(1.1)
Total non-operating expense, net	60.7	53.2	199.8	165.6
Income (loss) from continuing operations before income tax expense (benefit)	235.0	(175.1)	(63.4)	(253.7)
Income tax expense (benefit)	39.9	(40.3)	(11.0)	(56.7)
Income (loss) from continuing operations, net of tax	195.1	(134.8)	(52.4)	(197.0)
Discontinued operations:
(Loss) income from discontinued operations, including gain on sale of discontinued operations	(0.4)	95.4	(1.8)	107.8
Income tax (benefit) expense	(0.1)	28.1	(0.4)	29.6
(Loss) income from discontinued operations, net of tax	(0.3)	67.3	(1.4)	78.2
Net income (loss)	194.8	(67.5)	(53.8)	(118.8)
Net income attributed to non-controlling interests	16.8	9.3	47.3	27.8
Net income (loss) attributable to Delek	$ 178.0	$ (76.8)	$ (101.1)	$ (146.6)
Basic income (loss) per share:
Income (loss) from continuing operations (in dollars per share)	$ 2.96	$ (2.25)	$ (1.64)	$ (3.51)
Income (loss) from discontinued operations (in dollars per share)	0	1.05	(0.02)	1.22
Total basic income (loss) per share (in dollars per share)	2.96	(1.20)	(1.66)	(2.29)
Diluted income (loss) per share:
Income (loss) from continuing operations (in dollars per share)	2.93	(2.25)	(1.64)	(3.51)
Income (loss) income from discontinued operations (in dollars per share)	0	1.05	(0.02)	1.22
Total diluted income (loss) per share (in dollars per share)	$ 2.93	$ (1.20)	$ (1.66)	$ (2.29)
Weighted average common shares outstanding:
Basic (in shares)	60,190,054	64,063,609	60,930,537	64,099,700
Diluted (in shares)	60,944,900	64,063,609	60,930,537	64,099,700