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v3.22.2

Postretirement Plans - Additional Information (Detail) - USD ($) | 4 Months Ended
--- | ---
Apr. 23, 2022 | Apr. 24, 2021
Pension and Other Postretirement Benefits Disclosure [Line Items] |  |
Voluntarily contributions made by an employer | $ 0 | $ 0

X
- Definition Pension and other postretirement benefits disclosure. + References No definition available. + Details
Name: | flo_PensionAndOtherPostretirementBenefitsDisclosureLineItems
Namespace Prefix: | flo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration