Actual Percentage earned on 2012 return on invested capital award

No definition available.

Name:	flo_PercentageOfActualAverageReturnOnInvestedCapitalOnShareBasedCompensationArrangement
Namespace Prefix:	flo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Range of Percentage Of Target Incentive Required Payout

+ References

No definition available.

+ Details

Name:	flo_PercentageOfTargetIncentiveRequiredPayout
Namespace Prefix:	flo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of target number of shares being expensed.

+ References

No definition available.

+ Details

Name:	flo_PercentageOfTargetNumberOfSharesBeingExpensed
Namespace Prefix:	flo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Range of payout in percentage of target shares possible to earn.

+ References

No definition available.

+ Details

Name:	flo_PercentageOfTargetShares
Namespace Prefix:	flo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Return On Investment Share Based Compensation Arrangement By Share Based Payment Award Performance Condition target Percentage in excess of weighted average cost of capital.

+ References

No definition available.

+ Details

Name:	flo_ReturnOnInvestmentSharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceConditionPercentage
Namespace Prefix:	flo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

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

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_AwardTypeAxis=flo_ReturnOnInvestedCapitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=flo_RangeOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=flo_RangeTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=flo_RangeThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardDateAxis=flo_TwentyNineteenAwardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis=flo_ReturnOnInvestedCapitalSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=flo_TwentySeventeenAwardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis=flo_ShareholdersReturnSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stock-Based Compensation (Performance-Contingent Return on Invested Capital Shares) - Additional Information (Detail) - shares		4 Months Ended
	May 23, 2019	Apr. 18, 2020
Return On Invested Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC		1.75%
Return On Invested Capital \| Range One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC		1.75%
Return On Invested Capital \| Range Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC		3.75%
Return On Invested Capital \| Range Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC		4.75%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Return on investment target over the three fiscal years immediately preceding the vesting date		4.75%
Percentage of shares that can be earned		125.00%
Maximum \| 2019 Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares being expensed		100.00%
Weighted Average Cost of Capital \| Range One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC		50.00%
Weighted Average Cost of Capital \| Range Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC		100.00%
Weighted Average Cost of Capital \| Range Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC		125.00%
Weighted Average Cost of Capital \| Return On Invested Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC		0.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Return on investment target over the three fiscal years immediately preceding the vesting date		1.75%
Percentage of shares that can be earned		0.00%
Performance Contingent Return On Invested Capital Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Performance Contingent Return On Invested Capital Shares \| 2017 Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of actual ROI attainment		75.00%
Awards vested during period		0
Performance Contingent Total Shareholders Return Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Forfeited	112,840