Revenue - Narrative (Details) - USD ($) $ in Billions	12 Months Ended
Jan. 31, 2026	Feb. 01, 2025
Revenue from Contract with Customer [Abstract]
Revenue recognized	$ 1.1	$ 1.1

Contract With Customer, Liability, Revenue Recognized, Including Opening Balance

No definition available.

Name:	bby_ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance
Namespace Prefix:	bby_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration