Long-Term Obligations and Notes Payable - Outstanding Borrowings Schedule (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term Debt	$ 2,733.6	$ 2,218.0
Current portion of long-term debt	63.0	92.2	[1]
Long-term debt, net of current portion	2,670.6	2,125.8	[1]
Delek Term Loan Credit Facility | Term loan
Debt Instrument [Line Items]
Long-term Debt	1,234.8	1,240.0
Footnote:
Deferred financing costs	1.7	2.2
Debt discount	13.7	17.8
Hapoalim Term Loan | Notes Payable to Banks
Debt Instrument [Line Items]
Long-term Debt	0.0	29.0
Footnote:
Deferred financing costs		0.1
Debt discount		0.1
DKL 2025 Notes | Senior notes
Debt Instrument [Line Items]
Long-term Debt	247.4	246.7
Footnote:
Deferred financing costs	2.0	2.5
Debt discount	0.6	0.8
DKL 2028 Notes | Senior notes
Debt Instrument [Line Items]
Long-term Debt	395.0	394.3
Footnote:
Deferred financing costs	5.0	5.7
Revolving credit facility | Line of credit
Debt Instrument [Line Items]
Long-term Debt	0.0	0.0
Revolving credit facility | DKL Credit Facility | Line of credit
Debt Instrument [Line Items]
Long-term Debt	806.4	258.0
Footnote:
Deferred financing costs	0.5
Revolving credit facility | United Community Bank Revolver | Line of credit
Debt Instrument [Line Items]
Long-term Debt	$ 50.0	$ 50.0

[1] Adjusted to reflect the retrospective change in accounting policy from LIFO to FIFO for certain inventories. See Note 7 for further discussion.