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v3.22.1

Summary of Significant Accounting Policies (Description of Business) (Details) | Jan. 29, 2022 USD ($) Stores | Jan. 30, 2021 Stores
--- | --- | ---
Accounting Policies [Abstract] |  |
Products offering price, maximum price | $ | $ 5 |
Number of States in which Entity Operates | 40 |
Number of operated stores | Stores | 1,190 | 1,020

X
- Definition Number Of Company Operated Stores + References No definition available. + Details
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Namespace Prefix: | five_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Products Offering Price + References No definition available. + Details
Name: | five_ProductsOfferingPrice
Namespace Prefix: | five_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant