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Restructuring Activities - Additional Information (Detail) $ in Millions | 4 Months Ended
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Apr. 18, 2020 USD ($)
Restructuring And Related Activities [Abstract] |
Project centennial consulting costs | $ 3.4

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- Definition Project centennial consulting costs. + References No definition available. + Details
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Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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