Document and Entity Information	9 Months Ended
	Oct. 31, 2014	Nov. 28, 2014
Document and Entity Information
Entity Registrant Name	DOLLAR GENERAL CORP
Entity Central Index Key	0000029534
Document Type	10-Q
Document Period End Date	Oct. 31, 2014
Amendment Flag	false
Current Fiscal Year End Date	--01-30
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		303,425,920
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3