Summary of Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Feb. 01, 2025 USD ($) segment	Feb. 03, 2024 USD ($)	Jan. 28, 2023 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of operating segments | segment	2
Gain on sale of subsidiary, net		$ 21,000,000
Allowances for uncollectible receivables	$ 26,000,000	32,000,000
Write-offs	48,000,000	43,000,000
Goodwill	$ 908,000,000	$ 1,383,000,000
Percentage of commissions on sale of extended warranties to revenue	0.90%	0.80%	0.90%
Profit share on sale of extended warranties	1.10%	1.40%	1.40%
Gift card redemption within 1 year, percentage	90.00%
Revenue recognized	$ 1,100,000,000	$ 1,300,000,000
Period of Expiration for Customer Loyalty Certificates, Low End of Range	2 months
Advertising costs	$ 846,000,000	$ 794,000,000	$ 864,000,000
Branded cards	25.00%	25.00%	25.00%
2028 Notes [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt	$ 500,000,000
Best Buy Health [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill	416,000,000	$ 891,000,000
Intangible asset impairments	0
Best Buy Domestic [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill	$ 492,000,000	$ 492,000,000
Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Term of contract	1 month
Customer loyalty program, certificate expiration period	1 month
Minimum [Member] | Software [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives	2 years
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Term of contract	1 year
Customer loyalty program, certificate expiration period	5 years
Maximum [Member] | Software [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives	5 years