Document and Entity Information Document - shares	6 Months Ended
	Jul. 31, 2021	Sep. 03, 2021
Document Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jul. 31, 2021
Document Transition Report	false
Entity File Number	001-08897
Entity Registrant Name	BIG LOTS, INC.
Entity Incorporation, State or Country Code	OH
Entity Tax Identification Number	06-1119097
Entity Address, Address Line One	4900 E. Dublin-Granville Road
Entity Address, City or Town	Columbus
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	43081
City Area Code	614
Local Phone Number	278-6800
Entity Central Index Key	0000768835
Title of 12(b) Security	Common shares
Trading Symbol	BIG
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		32,556,311
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--01-31
Amendment Flag	false
Entity Small Business	false