Inventory - Schedule of Effect of Change in Accounting Principle (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021		Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021		Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of materials and other										$ 18,355.6	$ 9,643.9	[1]	$ 6,845.5	[1]
Total cost of sales										19,321.2	10,385.5	[1]	7,562.8	[1]
Income (loss) before income tax expense (benefit)										354.4	(137.3)	[1]	(767.4)	[1]
Income tax expense (benefit)										63.9	(42.0)	[1]	(193.6)	[1]
Net (loss) income	$ (109.7)	$ 16.8	$ 368.6	$ 14.8	$ (5.1)		$ 20.6	$ (48.1)	$ (62.7)	290.5	(95.3)	[2]	(573.8)	[2]
Net income (loss) attributable to Delek	$ (118.7)	$ 7.4	$ 361.8	$ 6.6	$ (13.4)		$ 11.8	$ (56.7)	$ (70.0)	$ 257.1	$ (128.3)	[1]	$ (611.4)	[1]
Basic income (loss) per share (in dollars per share)	$ (1.73)	$ 0.11	$ 5.11	$ 0.09	$ (0.18)		$ 0.16	$ (0.77)	$ (0.95)	$ 3.63	$ (1.73)	[1]	$ (8.31)	[1]
Diluted income (loss) per share (in dollars per share)	$ (1.73)	$ 0.10	$ 5.05	$ 0.09	$ (0.18)		$ 0.16	$ (0.77)	$ (0.95)	$ 3.59	$ (1.73)	[1]	$ (8.31)	[1]
Inventories, net of inventory valuation reserves	$ 1,518.5				$ 1,260.7	[3]				$ 1,518.5	$ 1,260.7	[3]
Total Assets	8,192.8				6,812.6	[3]				8,192.8	6,812.6	[3]
Accrued expenses and other current liabilities	1,166.8				797.8	[3]				1,166.8	797.8	[3]
Deferred tax liabilities	266.5				214.5	[3]				266.5	214.5	[3]
Retained earnings	507.9				384.7	[3]				507.9	384.7	[3]
Total liabilities and stockholders' equity	8,192.8				6,812.6	[3]				8,192.8	6,812.6	[3]
Non-cash lower of cost or market/net realizable value adjustment										1.9	8.3	[2]	$ 0.2	[2]
Deferred income taxes										61.6	(38.9)	[2]	(33.0)	[2]
Inventories and other current assets										(254.4)	(468.6)	[2]	277.7	[2]
Accounts payable and other current liabilities										298.7	702.5	[2]	(480.3)	[2]
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of materials and other										18,366.4	9,739.6		6,841.2
Total cost of sales										19,332.0	10,481.2		7,558.5
Income (loss) before income tax expense (benefit)										343.6	(233.0)		(763.1)
Income tax expense (benefit)										61.6	(62.5)		(192.7)
Net (loss) income										282.0	(170.5)		(570.4)
Net income (loss) attributable to Delek										$ 248.6	$ (203.5)		$ (608.0)
Basic income (loss) per share (in dollars per share)										$ 3.51	$ (2.75)		$ (8.26)
Diluted income (loss) per share (in dollars per share)										$ 3.48	$ (2.75)		$ (8.26)
Inventories, net of inventory valuation reserves	1,423.0				1,176.1					$ 1,423.0	$ 1,176.1
Total Assets	8,097.3				6,728.0					8,097.3	6,728.0
Accrued expenses and other current liabilities	1,166.8									1,166.8
Deferred tax liabilities	246.0				196.4					246.0	196.4
Retained earnings	432.9				318.2					432.9	318.2
Total liabilities and stockholders' equity	8,097.3				6,728.0					8,097.3	6,728.0
Non-cash lower of cost or market/net realizable value adjustment										(0.9)	(22.3)		$ 29.2
Deferred income taxes										59.2	(59.4)		(32.1)
Inventories and other current assets										(240.7)	(342.3)		244.4
Accounts payable and other current liabilities										298.7
Revision of Prior Period, Change in Accounting Principle, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of materials and other										10.8	(95.7)		4.3
Total cost of sales										10.8	(95.7)		4.3
Income (loss) before income tax expense (benefit)										(10.8)	95.7		(4.3)
Income tax expense (benefit)										(2.3)	20.5		(0.9)
Net (loss) income										(8.5)	75.2		(3.4)
Net income (loss) attributable to Delek										$ (8.5)	$ 75.2		$ (3.4)
Basic income (loss) per share (in dollars per share)										$ (0.12)	$ 1.02		$ (0.05)
Diluted income (loss) per share (in dollars per share)										$ (0.11)	$ 1.02		$ (0.05)
Inventories, net of inventory valuation reserves	(95.5)				84.6					$ (95.5)	$ 84.6
Total Assets	(95.5)				84.6					(95.5)	84.6
Accrued expenses and other current liabilities	0.0									0.0
Deferred tax liabilities	(20.5)				18.1					(20.5)	18.1
Retained earnings	(75.0)				66.5					(75.0)	66.5
Total liabilities and stockholders' equity	$ (95.5)				$ 84.6					(95.5)	84.6
Non-cash lower of cost or market/net realizable value adjustment										(2.8)	30.6		$ (29.0)
Deferred income taxes										(2.4)	20.5		(0.9)
Inventories and other current assets										13.7	$ (126.3)		$ 33.3
Accounts payable and other current liabilities										$ 0.0

[1] Adjusted to reflect the retrospective change in accounting policy from LIFO to FIFO for certain inventories. See Note 8 for further discussion.

[2] Adjusted to reflect the retrospective change in accounting policy from LIFO to FIFO for certain inventories. See Note 8 for further discussion.

[3] Adjusted to reflect the retrospective change in accounting policy from LIFO to FIFO for certain inventories. See Note 8 for further discussion.