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Related Party Transactions - Omnibus Agreement (Details) - Omnibus Agreement - Delek US and affiliates - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Related Party Transaction [Line Items]    
Related Party Annual Service Fee $ 4.7  
Delek US | Other long term liabilities    
Related Party Transaction [Line Items]    
Reimbursement of capital expenditures by Delek Holdings $ 0.0 $ 0.6