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v3.19.3.a.u2

Notes Receivable from IDPs - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 28, 2019
Maximum |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Financing period of distribution rights, years | 10 years

X
- Definition Represents the term in years for distributor notes receivable + References No definition available. + Details
Name: | flo_FinancingPeriodOfDistributorNotesReceivable
Namespace Prefix: | flo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |