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Accumulated Other Comprehensive Loss (Income) Related to Derivative Transactions (Detail) (USD $)	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions	$ (3,201,000)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	$ (24,457,000)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	$ (1,546,000)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
Closed or Expiring Over Next Three Years
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions	11,400,000us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeByNatureAxis = flo_ClosedOrExpiringOverNextThreeYearsMember
Closed or Expiring Over Next Three Years | Closed Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Estimated amount of derivatives to be reclassified in income from AOCI	1,400,000us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred / us-gaap_DerivativeByNatureAxis = flo_ClosedOrExpiringOverNextThreeYearsMember / flo_DerivativeContractExpirationAxis = flo_ContractsClosedMember
Closed or Expiring Over Next Three Years | Expiring in 2015
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions	8,500,000us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeByNatureAxis = flo_ClosedOrExpiringOverNextThreeYearsMember / flo_DerivativeContractExpirationAxis = flo_ExpiringYearOneMember
Closed or Expiring Over Next Three Years | Expiring in 2016 and beyond
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions	1,500,000us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeByNatureAxis = flo_ClosedOrExpiringOverNextThreeYearsMember / flo_DerivativeContractExpirationAxis = flo_ExpiringYearThreeMember
Commodity price risk derivatives | Closed or Expiring Over Next Three Years
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions	10,300,000us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeByNatureAxis = flo_ClosedOrExpiringOverNextThreeYearsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityOptionMember
Commodity price risk derivatives | Closed or Expiring Over Next Three Years | Closed Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Estimated amount of derivatives to be reclassified in income from AOCI	300,000us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred / us-gaap_DerivativeByNatureAxis = flo_ClosedOrExpiringOverNextThreeYearsMember / flo_DerivativeContractExpirationAxis = flo_ContractsClosedMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityOptionMember
Commodity price risk derivatives | Closed or Expiring Over Next Three Years | Expiring in 2015
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions	8,500,000us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeByNatureAxis = flo_ClosedOrExpiringOverNextThreeYearsMember / flo_DerivativeContractExpirationAxis = flo_ExpiringYearOneMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityOptionMember
Commodity price risk derivatives | Closed or Expiring Over Next Three Years | Expiring in 2016 and beyond
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions	1,500,000us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeByNatureAxis = flo_ClosedOrExpiringOverNextThreeYearsMember / flo_DerivativeContractExpirationAxis = flo_ExpiringYearThreeMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityOptionMember
Interest rate risk derivatives | Closed or Expiring Over Next Three Years
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated other comprehensive income (loss) related to commodity price risk and interest rate risk derivative transactions	1,100,000us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet / us-gaap_DerivativeByNatureAxis = flo_ClosedOrExpiringOverNextThreeYearsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember
Interest rate risk derivatives | Closed or Expiring Over Next Three Years | Closed Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Estimated amount of derivatives to be reclassified in income from AOCI	$ 1,100,000us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred / us-gaap_DerivativeByNatureAxis = flo_ClosedOrExpiringOverNextThreeYearsMember / flo_DerivativeContractExpirationAxis = flo_ContractsClosedMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember

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The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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