Restructuring (Composition of Restructuring Charges) (Details) - USD ($) $ in Millions	3 Months Ended
	May 03, 2025	May 04, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 109	$ 15
Best Buy Health Optimization and China Sourcing Initiative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	111
2024 Resource Optimization Initiative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(2)	16
2023 Resource Optimization Initiative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(1)
Asset Impairments [Member] \| Best Buy Health Optimization and China Sourcing Initiative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	73
Termination Benefits [Member] \| Best Buy Health Optimization and China Sourcing Initiative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	38
Termination Benefits [Member] \| 2024 Resource Optimization Initiative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(2)	16
Cumulative Amount	172
Domestic Segment [Member] \| Termination Benefits [Member] \| 2024 Resource Optimization Initiative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(2)	17
Cumulative Amount	164
International Segment [Member] \| Termination Benefits [Member] \| 2024 Resource Optimization Initiative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ (1)
Cumulative Amount	$ 8