Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net revenues	$ 1,821.2	$ 2,199.9
Cost of sales:
Cost of materials and other	1,910.6	1,699.4
Operating expenses (excluding depreciation and amortization presented below)	129.2	140.9
Depreciation and amortization	47.0	39.3
Total cost of sales	2,086.8	1,879.6
Operating expenses related to retail and wholesale business (excluding depreciation and amortization presented below)	25.3	25.8
General and administrative expenses	65.7	62.2
Depreciation and amortization	5.6	7.5
Other operating (income) expense, net	(0.7)	2.4
Total operating costs and expenses	2,182.7	1,977.5
Operating (loss) income	(361.5)	222.4
Interest expense	36.3	28.7
Interest income	(1.7)	(2.5)
Income from equity method investments	(5.1)	(2.6)
Other income, net	(0.9)	(1.4)
Total non-operating expenses, net	28.6	22.2
(Loss) income before income tax (benefit) expense	(390.1)	200.2
Income tax (benefit) expense	(83.1)	45.8
(Loss) income from continuing operations, net of tax	(307.0)	154.4
Discontinued operations:
Net (loss) income	(307.0)	154.4
Net income attributed to non-controlling interests	7.4	5.1
Net (loss) income attributable to Delek	$ (314.4)	$ 149.3
Basic (loss) income per share:
Total basic income per share (USD per Share)	$ (4.28)	$ 1.92
Diluted (loss) income per share:
Total diluted income per share (USD per share)	(4.28)	1.90
Dividends declared per common share outstanding (in dollars per share)	$ 0.31	$ 0.27