Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 46.7	$ 290.5	$ (95.3)
Other comprehensive (loss) income:
Comprehensive loss on commodity contracts designated as cash flow hedges, net of taxes	0.0	0.0	(0.2)
Postretirement benefit plans:
Net actuarial gain (loss)	0.7	(1.9)	4.7
Amortization of net actuarial gain	(0.2)	0.0	0.0
Net change related to postretirement benefit plans	0.5	(1.9)	4.7
Income tax expense (benefit)	0.1	(0.5)	1.1
Net comprehensive gain (loss) on postretirement benefit plans	0.4	(1.4)	3.6
Total other comprehensive income (loss)	0.4	(1.4)	3.4
Comprehensive income (loss)	47.1	289.1	(91.9)
Comprehensive income attributable to non-controlling interest	26.9	33.4	33.0
Comprehensive income (loss) attributable to Delek	$ 20.2	$ 255.7	$ (124.9)