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Document and Entity Information - USD ($)
$ in Billions
 12 Months Ended
Jan. 31, 2025
Mar. 19, 2025
Aug. 02, 2024
Document and Entity Information      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jan. 31, 2025    
Document Transition Report false    
Securities Act File Number 001-11421    
Entity Registrant Name DOLLAR GENERAL CORPORATION    
Entity Incorporation, State or Country Code TN    
Entity Tax Identification Number 61-0502302    
Entity Address, Address Line One 100 MISSION RIDGE    
Entity Address, City or Town GOODLETTSVILLE    
Entity Address, State or Province TN    
Entity Address, Postal Zip Code 37072    
City Area Code 615    
Local Phone Number 855-4000    
Title of 12(b) Security Common Stock, par value $0.875 per share    
Trading Symbol DG    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 17.8
Entity Common Stock, Shares Outstanding   219,947,078  
Auditor Name Ernst & Young LLP    
Auditor Firm ID 42    
Auditor Location Nashville, Tennessee    
Entity Central Index Key 0000029534    
Current Fiscal Year End Date --01-31    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false    
Documents Incorporated by Reference

Certain of the information required in Part III of this Form 10-K is incorporated by reference to the registrant’s definitive proxy statement to be filed for the Annual Meeting of Shareholders to be held on May 29, 2025.