v3.19.1
Document and Entity Information - shares
3 Months Ended
May 03, 2019
May 24, 2019
Document and Entity Information    
Entity Registrant Name DOLLAR GENERAL CORP  
Entity Central Index Key 0000029534  
Document Type 10-Q  
Document Period End Date May 03, 2019  
Amendment Flag false  
Current Fiscal Year End Date --01-31  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   258,322,808
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1