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Document Information Statement - USD ($)
$ in Billions
 12 Months Ended
Feb. 03, 2024
Mar. 13, 2024
Jul. 28, 2023
Document Information [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Fiscal Period Focus FY    
Document Period End Date Feb. 03, 2024    
Current Fiscal Year End Date --02-03    
Document Fiscal Year Focus 2024    
Document Transition Report false    
Entity File Number 1-9595    
Entity Registrant Name BEST BUY CO., INC.    
Entity Incorporation, State or Country Code MN    
Entity Address, Address Line One 7601 Penn Avenue South    
Entity Address, City or Town Richfield    
Entity Address, State or Province MN    
Entity Tax Identification Number 41-0907483    
Entity Address, Postal Zip Code 55423    
City Area Code 612    
Local Phone Number 291-1000    
Title of 12(b) Security Common Stock, $0.10 par value per share    
Trading Symbol BBY    
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    
Entity Shell Company false    
ICFR Auditor Attestation Flag true    
Entity Public Float     $ 14.1
Entity Common Stock, Shares Outstanding   215,381,395  
Documents Incorporated by Reference [Text Block] Portions of the registrant's Definitive Proxy Statement relating to its 2024 Regular Meeting of Shareholders ("Proxy Statement") are incorporated by reference into Part III. The Proxy Statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates.

    
Document Financial Statement Error Correction [Flag] false    
Entity Central Index Key 0000764478    
Amendment Flag false    
Auditor Firm ID 34    
Auditor Location Minneapolis, Minnesota    
Auditor Name Deloitte & Touche LLP