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Fair Value of Financial Instruments - Additional Information (Detail) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 07, 2023 USD ($) | Dec. 28, 2024 USD ($) Distributor | Dec. 30, 2023 USD ($) Distributor
Fair Value Disclosures [Line Items] |  |  |
Number of independent distributors | Distributor |  | 2,600 | 3,000
Reserve for distributor notes receivable | $ | $ 14.9 | $ 2.4 | $ 14.8
Maximum |  |  |
Fair Value Disclosures [Line Items] |  |  |
Financing period of distribution rights, years |  | 10 years |

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

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

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

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- 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

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