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Related Party Transactions - Additional Information (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Aug. 13, 2020
Mar. 31, 2020
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Mar. 01, 2020
Feb. 29, 2020
Related Party Transaction [Line Items]              
Stock Repurchased During Period, Value     $ 5.0        
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              
Related Party Transaction [Line Items]              
General Partner Economic Interest, Pecent 2.00%            
Common unitholders - Delek | Limited Partner              
Related Party Transaction [Line Items]              
Common Limited Partner Units Issued In Restructuring Transaction     451,822        
Delek US Holdings, Inc. | Delek Logistics              
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%   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 $ 0.9    
Big Spring Gathering Asset              
Related Party Transaction [Line Items]              
Asset Acquisition, Equity Interest Transfered As Consideration, Shares   5,000,000.0