Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Feb. 03, 2017	Mar. 17, 2017	Jul. 29, 2016
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, 2017
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			$ 26,700
Entity Common Stock, Shares Outstanding		275,095,294
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY