Fair Value Measurements (Details) - EBP 002 - USD ($)	Dec. 31, 2025	Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	$ 3,380,706,713	$ 2,966,458,198
Fair Value, Inputs, Level 1, Level 2, and Level 3
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	124,013,782	145,298,014
Level 1 \| Cash and cash equivalents
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	4,054,675	3,788,479
Level 1 \| Best Buy Co., Inc. stock fund
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	78,478,924	97,909,706
Level 1 \| Registered investment companies
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	35,531,037	35,893,169
Level 1 \| Stable value fund
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	5,949,146	7,706,660
NAV
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	$ 3,256,692,931	$ 2,821,160,184

Fair value of investment, excluding plan interest in master trust, held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract not meeting fully-benefit responsive investment criteria.

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant