Restructuring (Schedule of Composition of Restructuring Charges) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 02, 2025	Aug. 03, 2024	Aug. 02, 2025	Aug. 03, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 114	$ (7)	$ 223	$ 8
Fiscal 2026 Labor and Store Optimization Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges	122	0	122	0
Fiscal 2026 Labor and Store Optimization Initiative | Domestic
Restructuring Cost and Reserve [Line Items]
Restructuring charges	119
Fiscal 2026 Labor and Store Optimization Initiative | International
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3
Best Buy Health Optimization and China Sourcing Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(6)	$ 0	105	$ 0
Termination benefits | Fiscal 2026 Labor and Store Optimization Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges	81
Termination benefits | Fiscal 2026 Labor and Store Optimization Initiative | Domestic
Restructuring Cost and Reserve [Line Items]
Restructuring charges	78
Termination benefits | Fiscal 2026 Labor and Store Optimization Initiative | International
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3
Termination benefits | Best Buy Health Optimization and China Sourcing Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(3)		35
Asset impairments | Fiscal 2026 Labor and Store Optimization Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges	41
Asset impairments | Fiscal 2026 Labor and Store Optimization Initiative | Domestic
Restructuring Cost and Reserve [Line Items]
Restructuring charges	41
Asset impairments | Fiscal 2026 Labor and Store Optimization Initiative | International
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Asset Impairments and Other Costs | Best Buy Health Optimization and China Sourcing Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ (3)		$ 70