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v3.21.1

Goodwill and Intangible Assets (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
May 01, 2021 | May 02, 2020 | Jan. 30, 2021
Intangible Assets [Line Items] |  |  |
Goodwill and intangible assets impairment charges | $ 0 | $ 0 | $ 0
Tradename [Member] |  |  |
Intangible Assets [Line Items] |  |  |
Indefinite-lived intangible | $ 0 |  |

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- Definition Intangible Assets [Line Items] + References No definition available. + Details
Name: | bby_IntangibleAssetsLineItems
Namespace Prefix: | bby_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. + References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |