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Assets Held for Sale - Additional Information (Detail) - Acquired Hostess Bread Assets Plants and Depots | Oct. 08, 2016 Facility
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Plants |
Long Lived Assets Held For Sale [Line Items] |
Number of Acquired Hostess Bread Assets to be sold | 20
Number of long lived assets sold | 10
Depots |
Long Lived Assets Held For Sale [Line Items] |
Number of Acquired Hostess Bread Assets to be sold | 36
Number of long lived assets sold | 19

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- Definition Number of long lived assets held for sale. + References No definition available. + Details
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Namespace Prefix: | flo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of long lived assets sold. + References No definition available. + Details
Name: | flo_NumberOfLongLivedAssetsSold
Namespace Prefix: | flo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

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- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=flo_AcquiredHostessAssetsPlantsAndDepotsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=flo_PlantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=flo_DepotsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |