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v3.22.2

Long Term Debt (Net of Issuance Costs and Debt Discounts Excluding Line-of-credit Arrangements) (Parenthetical) (Detail) | 6 Months Ended
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Jul. 16, 2022
2031 Notes |
Debt Instrument [Line Items] |
Senior notes due year | 2031
2026 Notes |
Debt Instrument [Line Items] |
Senior notes due year | 2026

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 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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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