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Financial Contracts Hedging Commodity and Interest Rate Risk (Detail) (Cash Flow Hedging, USD $) In Millions, unless otherwise specified	Jan. 03, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	$ 143.0invest_DerivativeNotionalAmount
Wheat Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	96.3invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = flo_WheatContractsMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember
Soybean Oil Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	32.1invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = flo_SoybeanOilContractsMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember
Natural Gas Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	$ 14.6invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = flo_NaturalGasContractsMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

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Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration