Lawsuit filing date.

No definition available.

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

- Definition

Number of distribution territories repurchased.

+ References

No definition available.

+ Details

Name:	flo_NumberOfDistributionTerritoriesRepurchased
Namespace Prefix:	flo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount awarded to other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12021-110248

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

+ Details

Name:	us-gaap_LossContingencyNewClaimsFiledNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Commitments and Contingencies - Additional Information (Detail) $ in Thousands						9 Months Ended
	Oct. 27, 2021 USD ($)	Oct. 21, 2021 USD ($) DistributionTerritory	Dec. 29, 2020 USD ($)	Sep. 29, 2020 USD ($)	Jan. 31, 2020 USD ($)	Oct. 09, 2021 Lawsuits
Loss Contingencies [Line Items]
Alleged complaints \| Lawsuits						24
Class and / or Collective action treatment
Loss Contingencies [Line Items]
Alleged complaints \| Lawsuits						8
Individual claims or do not seek class or collective action treatment or, in cases class treatment was sought
Loss Contingencies [Line Items]
Alleged complaints \| Lawsuits						16
Plaintiffs' motions for class certification
Loss Contingencies [Line Items]
Alleged complaints \| Lawsuits						4
Noll Maine
Loss Contingencies [Line Items]
Lawsuit filing date						Dec. 03, 2015
Noll Maine \| Subsequent Events
Loss Contingencies [Line Items]
Legal settlement		$ 16,500
Number of distribution territories repurchased \| DistributionTerritory		75
Loss contingency, estimated cost		$ 6,600
Noll Maine \| Other Accrued Liabilities \| Subsequent Events
Loss Contingencies [Line Items]
Loss contingency, estimated cost		4,700
Noll Maine \| Settlement Funds \| Subsequent Events
Loss Contingencies [Line Items]
Legal settlement		9,000
Noll Maine \| Attorneys Fees \| Subsequent Events
Loss Contingencies [Line Items]
Legal settlement		$ 7,500
Richard Louisiana
Loss Contingencies [Line Items]
Lawsuit filing date						Oct. 21, 2015
Coronado Mexico
Loss Contingencies [Line Items]
Lawsuit filing date						Apr. 27, 2016
Martins Florida
Loss Contingencies [Line Items]
Lawsuit filing date						Nov. 08, 2016
Caddick - Pennsylvania
Loss Contingencies [Line Items]
Lawsuit filing date						May 15, 2019
Caddick - Pennsylvania \| Subsequent Events
Loss Contingencies [Line Items]
Legal settlement	$ 3,150
Carr - Pennsylvania
Loss Contingencies [Line Items]
Lawsuit filing date			Dec. 01, 2015	Dec. 01, 2015
Legal settlement			$ 8,300	$ 13,250
Boulange Pennsylvania
Loss Contingencies [Line Items]
Lawsuit filing date						Mar. 25, 2016
Neff - Vermont
Loss Contingencies [Line Items]
Lawsuit filing date					Dec. 02, 2015
Legal settlement					$ 7,600