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Segments - Schedule of Expense (Recovery) Items (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 08, 2022 | Dec. 28, 2024 | Dec. 30, 2023 | Dec. 31, 2022
Segment, Reconciliation of Other Items from Segments to Consolidated [Abstract] |  |  |  |  |
Business process improvement costs |  |  | $ 4,529 | $ 21,521 | $ 33,169
Restructuring charges |  |  | 7,403 | 7,099 |
Restructuring-related implementation costs | [1] |  | 2,979 |  |
Plant closure costs and impairment of assets |  |  | 10,310 | 7,298 | 7,825
Acquisition related costs |  | $ 11,600 | 2,008 | 3,712 | 12,518
Legal settlements and related costs |  |  | 3,800 | 137,529 | 7,500
Pension plan settlement loss |  |  | 241 |  |
Gain on sale, severance costs, and lease termination gain |  |  |  |  | (4,390)
FASTER Act, net of recovery on inferior ingredients |  |  |  |  | 236
Total |  |  | $ 31,270 | $ 177,159 | $ 56,858
[1] | Costs are recorded in the selling, distribution and administrative expenses line item of our Consolidated Statements of Income.

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- Definition Business process improvement cost. + References No definition available. + Details
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Namespace Prefix: | flo_
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Balance Type: | debit
Period Type: | duration

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- Definition Expense (recovery) operating and nonoperating. + References No definition available. + Details
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Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition FASTER act, net of recovery on inferior ingredients. + References No definition available. + Details
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Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Gain on sale, severance costs, and lease termination gain. + References No definition available. + Details
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Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Legal settlements and related costs. + References No definition available. + Details
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Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Pension plan settlement loss. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Plant closure costs and impairment of assets. + References No definition available. + Details
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Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Restructuring-related implementation costs. + References No definition available. + Details
Name: | flo_RestructuringRelatedImplementationCosts
Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479405/805-10-25-23 + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.b.1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482047/420-10-45-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-1 + Details
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- References No definition available. + Details
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