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v3.20.1

Other Current and Non-Current Assets - Additional Information (Detail) $ in Millions | 4 Months Ended
--- | ---
Apr. 18, 2020 USD ($) Lawsuits
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] |
Insurance legal settlement | $ | $ 22.3
Number of lawsuits | Lawsuits | 2

X
- Definition Noncash insurance legal settlement. + References No definition available. + Details
Name: | flo_NoncashInsuranceLegalSettlement
Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the number of lawsuits. + References No definition available. + Details
Name: | flo_NumberOfLawsuits
Namespace Prefix: | flo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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