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Stock-Based Compensation (Deferred and Restricted Stock) - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended | 0 Months Ended | 3 Months Ended | 0 Months Ended | 1 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 03, 2015 | May 31, 2013 | Jul. 12, 2014 | Jan. 02, 2015 | Jan. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation cost related to nonvested restricted stock granted by the EPIP | $ 4.3 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized |  |  |  |
Expected weighted-average period to recognize compensation cost (years) | 1 year |  |  |  |
Chief Executive Officer |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Restricted stock award |  | 1.3 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefExecutiveOfficerMember |  |  |
Restricted shares issued |  | 58,500 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefExecutiveOfficerMember |  |  |
Deferred Stock | Distributed to director who retired on May 21, 2014 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Deferred shares distributed | 105,621 us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued / us-gaap_AwardTypeAxis = flo_DeferredStockMember / flo_DeferredCompensationPlanAxis = flo_ScenarioOneMember |  |  |  |
Deferred Stock | Distributed to director who retired on December 31, 2014 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Deferred shares distributed | 46,364 us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued / us-gaap_AwardTypeAxis = flo_DeferredStockMember / flo_DeferredCompensationPlanAxis = flo_ScenarioTwoMember |  |  |  |
Deferred Stock | Annual Grant Awards | Non Employee Directors |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Aggregate shares converted |  |  | 60,300 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod / us-gaap_AwardTypeAxis = flo_DeferredStockMember / us-gaap_PlanNameAxis = flo_AnnualGrantsMember / us-gaap_TitleOfIndividualAxis = flo_NonEmployeeDirectorsMember |  |
Deferred shares distributed | 27,075 us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued / us-gaap_AwardTypeAxis = flo_DeferredStockMember / us-gaap_PlanNameAxis = flo_AnnualGrantsMember / us-gaap_TitleOfIndividualAxis = flo_NonEmployeeDirectorsMember |  |  |  |
Deferred Stock | Annual Grant Awards | Non Employee Directors | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 1 year |  |  |  |
Deferred Stock | Omnibus Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Retainers conversion into deferred shares | 100.00%flo_PercentageOfConversionPriceEqualingStockPrice / us-gaap_AwardTypeAxis = flo_DeferredStockMember / us-gaap_PlanNameAxis = flo_OmnibusPlanMember |  |  |  |
Vesting period | 1 year |  |  |  |
Aggregate shares converted |  |  |  | 19,852 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod / us-gaap_AwardTypeAxis = flo_DeferredStockMember / us-gaap_PlanNameAxis = flo_OmnibusPlanMember |
Aggregate shares converted, amortization period |  |  |  | 1 year |
Deferred Stock | Retainer Conversion |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Deferred shares distributed | 18,330 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted / us-gaap_AwardTypeAxis = flo_DeferredStockMember / us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis = flo_RetainerConversionMember |  |  |  |
Retainers conversion into deferred shares | 130.00%flo_PercentageOfConversionPriceEqualingStockPrice / us-gaap_AwardTypeAxis = flo_DeferredStockMember / us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis = flo_RetainerConversionMember |  |  |  |
Aggregate shares converted |  |  |  |  | 36,425 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod / us-gaap_AwardTypeAxis = flo_DeferredStockMember / us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis = flo_RetainerConversionMember
Deferred Stock | Retainer Conversion | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period | 2 years |  |  |  |
Restricted Stock Award | Chief Executive Officer |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Restricted shares per share |  | $ 22.25 us-gaap_SharesIssuedPricePerShare / us-gaap_AwardTypeAxis = flo_RestrictedStockAwardMember / us-gaap_TitleOfIndividualAxis = us-gaap_ChiefExecutiveOfficerMember |  |  |
Deferred Stock Activity |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation cost related to nonvested restricted stock granted by the EPIP | 1.8 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_AwardTypeAxis = flo_DeferredStockActivityMember |  |  |  |
Expected weighted-average period to recognize compensation cost (years) | 1 year 5 months 16 days |  |  |  |
Total fair value of shares vested | 2.5 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / us-gaap_AwardTypeAxis = flo_DeferredStockActivityMember |  |  |  |
Award vesting tax windfall | $ 0.7 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_AwardTypeAxis = flo_DeferredStockActivityMember |  |  |  |

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- Definition Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 740 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6419406&loc=d3e23524-113945 + Details
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- Definition Number of shares issued pursuant to the terms of a deferred compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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