Document and Entity Information (USD $)
In Billions, except Share data, unless otherwise specified
12 Months Ended
Feb. 03, 2012
Mar. 16, 2012
Jul. 29, 2011
Document and Entity Information      
Entity Registrant Name DOLLAR GENERAL CORP    
Entity Central Index Key 0000029534    
Document Type 10-K    
Document Period End Date Feb. 03, 2012    
Amendment Flag false    
Current Fiscal Year End Date --02-03    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 3.12
Entity Common Stock, Shares Outstanding   338,091,175  
Document Fiscal Year Focus 2011    
Document Fiscal Period Focus FY