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v3.25.1

Fair Value of Financial Instruments - Additional Information (Detail) $ in Millions | 4 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 19, 2025 USD ($) Distributor | Dec. 28, 2024 USD ($) Distributor
Fair Value Disclosures [Line Items] |  |
Number of independent distributors | Distributor | 2,500 | 2,600
Percentage of down payment on distribution rights purchased | 5.00% |
Reserve for distributor notes receivable | $ | $ 0.4 | $ 2.4
3.5% Senior Notes Due 2026 |  |
Fair Value Disclosures [Line Items] |  |
Senior notes due year | 2026 |
2.4 % Senior Notes Due 2031 |  |
Fair Value Disclosures [Line Items] |  |
Senior notes due year | 2031 |
Maximum |  |
Fair Value Disclosures [Line Items] |  |
Financing period of distribution rights, years | 10 years |

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
- 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 Represents the approximate number of independent distributors for the company. + References No definition available. + Details
Name: | flo_NumberOfIndependentDistributors
Namespace Prefix: | flo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of down payment on distribution rights purchased. + References No definition available. + Details
Name: | flo_PercentageOfDownPaymentOnDistributionRightsPurchased
Namespace Prefix: | flo_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Reserve for distributor notes receivable. + References No definition available. + Details
Name: | flo_ReserveForDistributorNotesReceivable
Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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: |

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