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Assets Held for Sale - Additional Information (Detail) | 4 Months Ended
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Apr. 18, 2020 Bakery
Property Plant And Equipment [Abstract] |
Number of closed bakeries reclassified as held for sale | 2

X
- Definition Number of closed bakeries reclassified as held for sale. + References No definition available. + Details
Name: | flo_NumberOfClosedBakeriesReclassifiedAsHeldForSale
Namespace Prefix: | flo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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