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Schedule of Intangible Assets Subject to Amortization (Detail) (Lepage Bakeries Inc, USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Jan. 03, 2015
Finite And Infinite Lived Intangible Assets [Line Items] |
Amount | $ 71,400 us-gaap_FinitelivedIntangibleAssetsAcquired1
Weighted average amortization years | 24 years 3 months 18 days
Customer Relationships |
Finite And Infinite Lived Intangible Assets [Line Items] |
Amount | 69,000 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = flo_LepageBakeriesIncMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Weighted average amortization years | 25 years
Noncompete Agreements |
Finite And Infinite Lived Intangible Assets [Line Items] |
Amount | $ 2,400 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = flo_LepageBakeriesIncMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember
Weighted average amortization years | 4 years

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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 Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration