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Related Party Transactions - Additional Information (Details) - USD ($) $ in Millions			1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 13, 2020	Mar. 31, 2020	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 01, 2020	Feb. 29, 2020
Related Party Transaction [Line Items]
Stock Repurchased During Period, Shares						0
Stock Repurchased During Period, Value			$ 5.0
Asset Acquisition, Equity Interest Transfered As Consideration, Shares						5,000,000
Revolving Credit Facility | DKL Revolver | Fifth Third Bank | Line of Credit
Related Party Transaction [Line Items]
Cash Consideration Received	$ 45.0
Delek US Holdings, Inc.
Related Party Transaction [Line Items]
Delek's limited partner ownership interest (as percent)						80.00%
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest, Shares						34,700,000
Delek Logistics GP [Member]
Related Party Transaction [Line Items]
General Partner Economic Interest, Pecent	2.00%
Common unitholders - Delek | Limited Partner
Related Party Transaction [Line Items]
Stock Repurchased During Period, Shares						451,822
Asset Acquisition, Equity Interest Transfered As Consideration, Shares						5,000,000
Delek US Holdings, Inc. | Delek Logistics [Member]
Related Party Transaction [Line Items]
Business Combination, Consideration Transferred Equity Interests Issued And Issuable, Shares	14,000,000.0
Delek US Holdings, Inc. | General Partnership
Related Party Transaction [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	5.20%
Ownership Interest in General Partner (as percent)	100.00%
Delek US and affiliates
Related Party Transaction [Line Items]
Related Party. Ownership Percentage In Company				70.50%		70.50%		62.60%	64.50%
Delek US and affiliates | DPG Management Agreement, Operating Service And Construction Fee Paid To Partnership
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party				$ 0.4	$ 0.8	$ 1.6	$ 3.6
Big Spring Gathering Asset
Related Party Transaction [Line Items]
Asset Acquisition, Equity Interest Transfered As Consideration, Shares		5,000,000.0

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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