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Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Income Taxes [Line Items]        
Income tax provision percentage 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate      
Operating loss carryforwards expiration year Through fiscal 2034.      
Deferred tax assets valuation allowance $ 2,534,000us-gaap_DeferredTaxAssetsValuationAllowance $ 2,895,000us-gaap_DeferredTaxAssetsValuationAllowance    
Gross amount of unrecognized tax benefits 2,107,000us-gaap_UnrecognizedTaxBenefits 4,809,000us-gaap_UnrecognizedTaxBenefits 7,304,000us-gaap_UnrecognizedTaxBenefits 8,709,000us-gaap_UnrecognizedTaxBenefits
Unrecognized tax benefits that would impact effective tax rate 2,100,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate      
Unrecognized tax benefit, accrued interest 300,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued 700,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued    
Bargain gain        
Income Taxes [Line Items]        
Income tax provision percentage 5.20%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
/ flo_OtherAcquisitionRelatedItemsAxis
= flo_BargainGainMember		      
State and Local Jurisdiction        
Income Taxes [Line Items]        
State net operating loss carryforwards 9,200,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		      
Credit carryforwards 900,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		      
Unrecognized tax benefits that would impact effective tax rate 700,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		      
Domestic Tax Authority        
Income Taxes [Line Items]        
Federal net operating loss carryforwards $ 11,300,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember