Earnings Per Share - Schedule of EPS (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator for EPS
Net (loss) income	$ (26.1)	$ (1.5)	$ (51.3)	$ 70.7
Less: Income attributed to non-controlling interests	11.1	6.8	18.5	14.7
Numerator for basic and diluted EPS attributable to Delek	$ (37.2)	$ (8.3)	$ (69.8)	$ 56.0
Denominator:
Weighted average common shares outstanding (denominator for basic EPS) (in shares)	64,213,899	65,773,609	64,117,943	66,359,537
Dilutive effect of stock-based awards (in shares)	0	0	0	475,785
Weighted average common shares outstanding, assuming dilution (denominator for diluted EPS) (in shares)	64,213,899	65,773,609	64,117,943	66,835,322
EPS:
Basic (loss) income per share (in dollars per share)	$ (0.58)	$ (0.13)	$ (1.09)	$ 0.84
Diluted (loss) income per share (in dollars per share)	$ (0.58)	$ (0.13)	$ (1.09)	$ 0.84
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)	1,397,499	2,572,768	1,250,217	2,149,803
Antidilutive due to loss
EPS:
Antidilutive securities excluded from computation of earnings per share (in shares)	664,225	464,170	660,263	0
Total antidilutive stock-based compensation
EPS:
Antidilutive securities excluded from computation of earnings per share (in shares)	2,061,724	3,036,938	1,910,480	2,149,803