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Performance Contingent ROIC Shares (Detail) (Return On Invested Capital, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 03, 2015
Grant Date January First Twenty Fourteen
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	366us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardDateAxis = flo_GrantDateFirstJanuaryTwentyFourteenMember / flo_RestrictedStockUnitsAxis = flo_ReturnOnInvestedCapitalMember
Assumed vesting date	Mar. 01, 2016
Fair value per share	$ 21.47us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardDateAxis = flo_GrantDateFirstJanuaryTwentyFourteenMember / flo_RestrictedStockUnitsAxis = flo_ReturnOnInvestedCapitalMember
Grant Date January First Twenty Thirteen
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	414us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardDateAxis = flo_GrantDateFirstJanuaryTwentyThirteenMember / flo_RestrictedStockUnitsAxis = flo_ReturnOnInvestedCapitalMember
Assumed vesting date	Mar. 01, 2015
Fair value per share	$ 15.51us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardDateAxis = flo_GrantDateFirstJanuaryTwentyThirteenMember / flo_RestrictedStockUnitsAxis = flo_ReturnOnInvestedCapitalMember

X

- Definition

Share Based Compensation Arrangement By Share Based Payment Award Vesting Date

+ References

No definition available.

+ Details

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Namespace Prefix:	flo_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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 (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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 (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Period Type:	duration

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