Earnings Per Share - Schedule of EPS (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Numerator for EPS
Net income (loss)	$ 46.7	$ 290.5	$ (95.3)
Less: Income attributed to non-controlling interest	26.9	33.4	33.0
Numerator for basic and diluted EPS attributable to Delek	$ 19.8	$ 257.1	$ (128.3)
Denominator:
Weighted average common shares outstanding (denominator for basic EPS) (in shares)	65,406,089	70,789,458	73,984,104
Dilutive effect of stock-based awards (in shares)	569,212	726,903	0
Weighted average common shares outstanding, assuming dilution (denominator for diluted EPS) (in shares)	65,975,301	71,516,361	73,984,104
EPS:
Basic income (loss) per share (in dollars per share)	$ 0.30	$ 3.63	$ (1.73)
Diluted income (loss) per share (in dollars per share)	$ 0.30	$ 3.59	$ (1.73)
Antidilutive stock-based compensation (because average share price is less than exercise price)
EPS:
Antidilutive securities excluded from computation of earnings per share (in shares)	1,718,880	2,299,660	2,988,718
Antidilutive due to loss
EPS:
Antidilutive securities excluded from computation of earnings per share (in shares)	0	0	598,775
Total antidilutive stock-based compensation
EPS:
Antidilutive securities excluded from computation of earnings per share (in shares)	1,718,880	2,299,660	3,587,493