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Restructuring (Schedule of Restructuring Accrual Activity) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 02, 2025	Aug. 03, 2024	Aug. 02, 2025	Aug. 03, 2024
Restructuring Reserve [Roll Forward]
Charges	$ 114	$ (7)	$ 223	$ 8
Best Buy Health Optimization and China Sourcing Initiative
Restructuring Reserve [Roll Forward]
Balances			0
Charges			66
Cash payments			(36)
Adjustments			(4)
Balances	26		26
Best Buy Health Optimization and China Sourcing Initiative \| Termination benefits
Restructuring Reserve [Roll Forward]
Balances			0
Charges			38
Cash payments			(9)
Adjustments			(3)
Balances	26		26
Best Buy Health Optimization and China Sourcing Initiative \| Asset Impairments and Other Costs
Restructuring Reserve [Roll Forward]
Balances			0
Charges			28
Cash payments			(27)
Adjustments			(1)
Balances	0		0
Fiscal 2024 Restructuring Initiative \| Termination benefits
Restructuring Reserve [Roll Forward]
Balances			85
Cash payments			(16)
Adjustments			(4)
Balances	65		65
Domestic \| Fiscal 2024 Restructuring Initiative \| Termination benefits
Restructuring Reserve [Roll Forward]
Balances			80
Cash payments			(15)
Adjustments			(4)
Balances	61		61
International \| Fiscal 2024 Restructuring Initiative \| Termination benefits
Restructuring Reserve [Roll Forward]
Balances			5
Cash payments			(1)
Adjustments			0
Balances	$ 4		$ 4