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v3.24.1

Summary of Significant Accounting Policies (Fiscal Year) (Details) | 12 Months Ended
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Feb. 03, 2024 | Jan. 28, 2023 | Jan. 29, 2022 | Feb. 01, 2020
Accounting Policies [Abstract] |  |  |  |
Fiscal year period | 364 days | 371 days | 364 days | 364 days

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- Definition Fiscal Year Period + References No definition available. + Details
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Namespace Prefix: | five_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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