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

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X

- 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.

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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.

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