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Schedule of Fair Value of Notes (Parenthetical) (Detail) | 6 Months Ended
--- | ---
Jul. 13, 2024
2026 Notes |
Fair Value Disclosures [Line Items] |
Senior notes due year | 2026
2031 Notes |
Fair Value Disclosures [Line Items] |
Senior notes due year | 2031

X
- Definition Debt instrument maturity date year. + References No definition available. + Details
Name: | flo_DebtInstrumentMaturityDateYear
Namespace Prefix: | flo_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value disclosures. + References No definition available. + Details
Name: | flo_FairValueDisclosuresLineItems
Namespace Prefix: | flo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=flo_ThreePointFivePercentSeniorNotesDueTwoThousandTwentySixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=flo_TwoPointFourPercentSeniorNotesDueTwoThousandThirtyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |