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Segment Data - Narrative (Details)
$ in Millions
9 Months Ended
May 07, 2020
USD ($)
Sep. 30, 2020
bbl / d
facility
store
Segment Reporting Information [Line Items]    
Number of stores | store   253
Refining    
Segment Reporting Information [Line Items]    
Refinery throughput capacity (in bpd)   302,000
Number Of Biodiesel Facilities | facility   3
Big Spring refinery | Refining    
Segment Reporting Information [Line Items]    
Refinery throughput capacity (in bpd)   73,000
El Dorado Refinery | Refining    
Segment Reporting Information [Line Items]    
Refinery throughput capacity (in bpd)   80,000
Tyler Refinery | Refining    
Segment Reporting Information [Line Items]    
Refinery throughput capacity (in bpd)   75,000
Krotz Spring Refinery | Refining    
Segment Reporting Information [Line Items]    
Refinery throughput capacity (in bpd)   74,000
Alon Bakersfield Property, Inc. [Member]    
Segment Reporting Information [Line Items]    
Disposal Group, Including Discontinued Operations, Call Option, Interest Percent 33.33%  
Disposal Group, Including Discontinued Operation, Consideration | $ $ 40.0  
Gain (Loss) on Disposition of Business | $ $ (56.8)