Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Income Statement [Abstract]
Net revenues	$ 2,653.1	$ 2,641.9
Cost of sales:
Cost of materials and other	2,465.8	2,399.5
Operating expenses (excluding depreciation and amortization presented below)	219.9	211.1
Depreciation and amortization	97.6	95.0
Total cost of sales	2,783.3	2,705.6
Operating expenses related to wholesale business (excluding depreciation and amortization presented below)	1.6	1.3
General and administrative expenses	44.0	61.5
Depreciation and amortization	5.7	6.3
Other operating expense (income), net	(2.2)	(7.0)
Total operating costs and expenses	2,832.4	2,767.7
Operating income (loss)	(179.3)	(125.8)
Interest expense, net	84.5	84.1
Income from equity method investments	(14.6)	(13.3)
Other expense (income), net	(0.3)	(1.6)
Total non-operating expense, net	69.6	69.2
Income (loss) from continuing operations before income tax expense (benefit)	(248.9)	(195.0)
Income tax expense (benefit)	(58.2)	(36.8)
Income (loss) from continuing operations, net of tax	(190.7)	(158.2)
Discontinued operations:
Income (loss) from discontinued operations	(0.3)	(0.4)
Income tax expense (benefit)	(0.1)	(0.1)
Income (loss) from discontinued operations, net of tax	(0.2)	(0.3)
Net income (loss)	(190.9)	(158.5)
Net income attributed to non-controlling interests	10.4	14.2
Net income (loss) attributable to Delek	$ (201.3)	$ (172.7)
Basic income (loss) per share:
(Loss) income from continuing operations (in dollars per share)	$ (3.34)	$ (2.78)
(Loss) income from discontinued operations (in dollars per share)	0	0
Total basic (loss) income per share (in dollars per share)	(3.34)	(2.78)
Diluted income (loss) per share:
(Loss) income from continuing operations (in dollars per share)	(3.34)	(2.78)
(Loss) income from discontinued operations (in dollars per share)	0	0
Total diluted (loss) income per share (in dollars per share)	$ (3.34)	$ (2.78)
Weighted average common shares outstanding:
Basic (in shares)	60,255,377	62,115,776
Diluted (in shares)	60,255,377	62,115,776