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Restructuring - Schedule of Restructuring Accrual Activity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 01, 2025	Nov. 02, 2024	Nov. 01, 2025	Nov. 02, 2024
Restructuring Reserve [Roll Forward]
Charges	$ (5)	$ (4)	$ 218	$ 4
Fiscal 2026 Labor and Store Optimization Initiative
Restructuring Reserve [Roll Forward]
Balances			0
Charges			81
Cash payments			(17)
Adjustments			(1)
Balances	63		63
Best Buy Health Optimization and China Sourcing Initiative
Restructuring Reserve [Roll Forward]
Balances			0
Charges			66
Cash payments			(44)
Adjustments			(7)
Balances	15		15
Best Buy Health Optimization and China Sourcing Initiative \| Termination benefits
Restructuring Reserve [Roll Forward]
Balances			0
Charges			38
Cash payments			(17)
Adjustments			(6)
Balances	15		15
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			(24)
Adjustments			(5)
Balances	56		56
Domestic \| Fiscal 2026 Labor and Store Optimization Initiative
Restructuring Reserve [Roll Forward]
Balances			0
Charges			78
Cash payments			(17)
Adjustments			(1)
Balances	60		60
Domestic \| Fiscal 2024 Restructuring Initiative \| Termination benefits
Restructuring Reserve [Roll Forward]
Balances			80
Cash payments			(21)
Adjustments			(5)
Balances	54		54
International \| Fiscal 2026 Labor and Store Optimization Initiative
Restructuring Reserve [Roll Forward]
Balances			0
Charges			3
Cash payments			0
Adjustments			0
Balances	3		3
International \| Fiscal 2024 Restructuring Initiative \| Termination benefits
Restructuring Reserve [Roll Forward]
Balances			5
Cash payments			(3)
Adjustments			0
Balances	$ 2		$ 2