Document Information Statement - USD ($) $ in Billions	12 Months Ended
	Jan. 29, 2022	Mar. 16, 2022	Jul. 30, 2021
Document Information [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Jan. 29, 2022
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--01-29
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			$ 24.5
Entity Common Stock, Shares Outstanding		225,227,756
Documents Incorporated by Reference [Text Block]	Portions of the registrant's Definitive Proxy Statement relating to its 2022 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 Fiscal Period Focus	FY
Entity Central Index Key	0000764478
Amendment Flag	false
Auditor Firm ID	34
Auditor Location	Minneapolis, Minnesota
Auditor Name	Deloitte & Touche LLP