Goodwill and Intangible Assets - Schedule of Definite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Jan. 31, 2026	Feb. 01, 2025
Intangible Asset, Acquired, Finite-Lived [Line Items]
Gross Carrying Amount	$ 482	$ 516
Accumulated Amortization	$ 477	425
Weighted-Average Useful Life Remaining as of January 31, 2026 (in years)	8 months 12 days
Best Buy Health Optimization and China Sourcing Initiative
Intangible Asset, Acquired, Finite-Lived [Line Items]
Gross Carrying Amount	$ 34
Accumulated Amortization	16
Customer relationships
Intangible Asset, Acquired, Finite-Lived [Line Items]
Gross Carrying Amount	339	360
Accumulated Amortization	339	285
Customer relationships | Best Buy Health
Intangible Asset, Acquired, Finite-Lived [Line Items]
Accumulated Amortization	53
Tradenames
Intangible Asset, Acquired, Finite-Lived [Line Items]
Gross Carrying Amount	87	92
Accumulated Amortization	$ 82	79
Weighted-Average Useful Life Remaining as of January 31, 2026 (in years)	8 months 12 days
Developed technology
Intangible Asset, Acquired, Finite-Lived [Line Items]
Gross Carrying Amount	$ 56	64
Accumulated Amortization	$ 56	$ 61