v2.4.0.8
Document And Entity Information
9 Months Ended
Sep. 30, 2014
Oct. 31, 2014
Document And Entity Information [Abstract]    
Entity Registrant Name HollyFrontier Corp  
Entity Central Index Key 0000048039  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 30, 2014  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   195,735,991