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Derivative Instruments (Effects of Derivative Instruments on Consolidated Statements of Earnings) (Details) - Designated As Hedging Instrument [Member] - USD ($) $ in Millions | 3 Months Ended
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May 03, 2025 | May 04, 2024
Interest Rate Swap Derivative Instruments [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Gain (Loss) Recognized | $ 6 | $ (15)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Interest Expense | Interest Expense
Carrying Value of Long Term Debt [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Gain (Loss) Recognized | $ (6) | $ 15
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Interest Expense | Interest Expense

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Indicates line item in statement of income or comprehensive income that includes gain (loss) from derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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Data Type: | na
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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=bby_CarryingValueOfLongTermDebtMember
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