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Employer Contributions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
IAM National Pension Fund
Defined Contribution and Defined Benefit Plans [Line Items]
EIN	516031295
Pension Plan No.	002
Pension Protection Act Zone Status	Green	Green
FIP/RP Status Pending/ Implemented	No
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	May 01, 2016
Contributions	$ 99us-gaap_MultiemployerPlanPeriodContributions / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = flo_IamNationalPensionFundMember	$ 104us-gaap_MultiemployerPlanPeriodContributions / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = flo_IamNationalPensionFundMember	$ 101us-gaap_MultiemployerPlanPeriodContributions / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = flo_IamNationalPensionFundMember
Retail Wholesale And Department Store International Union And Industry Pension Fund
Defined Contribution and Defined Benefit Plans [Line Items]
EIN	630708442
Pension Plan No.	001
Pension Protection Act Zone Status	Green	Green
FIP/RP Status Pending/ Implemented	No
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	Aug. 12, 2017
Contributions	132us-gaap_MultiemployerPlanPeriodContributions / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = flo_RetailWholesaleAndDepartmentStoreInternationalUnionAndIndustryPensionFundMember	130us-gaap_MultiemployerPlanPeriodContributions / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = flo_RetailWholesaleAndDepartmentStoreInternationalUnionAndIndustryPensionFundMember	115us-gaap_MultiemployerPlanPeriodContributions / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = flo_RetailWholesaleAndDepartmentStoreInternationalUnionAndIndustryPensionFundMember
Western Conference Of Teamsters Pension Trust
Defined Contribution and Defined Benefit Plans [Line Items]
EIN	916145047
Pension Plan No.	001
Pension Protection Act Zone Status	Green	Green
FIP/RP Status Pending/ Implemented	No
Surcharge Imposed	No
Expiration Date of Collective Bargaining Agreement	Feb. 04, 2017
Contributions	260us-gaap_MultiemployerPlanPeriodContributions / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = flo_WesternConferenceOfTeamstersPensionTrustMember	252us-gaap_MultiemployerPlanPeriodContributions / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = flo_WesternConferenceOfTeamstersPensionTrustMember	283us-gaap_MultiemployerPlanPeriodContributions / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = flo_WesternConferenceOfTeamstersPensionTrustMember
BC&T International Pension Fund
Defined Contribution and Defined Benefit Plans [Line Items]
EIN	526118572
Pension Plan No.	001
Pension Protection Act Zone Status	Red	Red
FIP/RP Status Pending/ Implemented	Implemented
Surcharge Imposed	Yes
Expiration Date of Collective Bargaining Agreement	Oct. 31, 2015
Contributions	$ 1,077us-gaap_MultiemployerPlanPeriodContributions / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = flo_BcandtInternationalPensionFundMember	$ 939us-gaap_MultiemployerPlanPeriodContributions / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = flo_BcandtInternationalPensionFundMember	$ 797us-gaap_MultiemployerPlanPeriodContributions / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = flo_BcandtInternationalPensionFundMember

X

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation 12B

-Number 240

-Section 12b

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- Definition

Three digit plan number for a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 80

-Section 50

-Paragraph 5

-Subparagraph (b)

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- Definition

Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 80

-Section 50

-Paragraph 11

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- Definition

Indicate the multiemployer plan's certified zone status as currently required by the Pension Protection Act of 2006 or a subsequent amendment thereof. The zone status categories are red (critical status), orange (seriously endangered), yellow (endangered), and green (none of the above). The acceptable values are "red", "orange", "yellow", "green", "other", and "NA". A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

+ References

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-SubTopic 80

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-Paragraph 5

-Subparagraph (c)

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- Definition

Expiration date of the collective bargaining arrangement requiring contributions to the multiemployer plan, in CCYY-MM-DD format. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

+ References

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-Publisher FASB

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- Definition

Indicate whether a funding improvement plan or rehabilitation plan has been implemented or is pending for a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. The acceptable values are "no", "pending", "implemented", "other", and "NA".

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

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- Definition

Indicate whether the employer paid a surcharge to the pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. The acceptable values are "no", "yes", and "NA".

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 80

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