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Unaudited Quarterly Financial Information - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 28, 2013 | Jul. 13, 2013 | Dec. 28, 2013
Selling, General and Administrative Expenses |  |  |
Schedule Of Quarterly Financial Information [Line Items] |  |  |
Out-of-period adjustments | $ 4.4 us-gaap_PriorPeriodReclassificationAdjustment / us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember |  |
Out-of-period adjustments, net of tax | 2.7 flo_PriorPeriodReclassificationAdjustmentNetOfTax / us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember |  |
Goodwill and Other Assets |  |  |
Schedule Of Quarterly Financial Information [Line Items] |  |  |
Out-of-period adjustments | $ 0.9 us-gaap_PriorPeriodReclassificationAdjustment / us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis = flo_GoodwillAndOtherAssetsMember | $ 1.1 us-gaap_PriorPeriodReclassificationAdjustment / us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis = flo_GoodwillAndOtherAssetsMember | $ 2.0 us-gaap_PriorPeriodReclassificationAdjustment / us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis = flo_GoodwillAndOtherAssetsMember

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- Definition Prior Period Reclassification Adjustment Net of Tax + 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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- Details
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Namespace Prefix: | flo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of a reclassification adjustment made to prior period financial statement amounts. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |