Debt instrument maturity date year.

No definition available.

Name:	flo_DebtInstrumentMaturityDateYear
Namespace Prefix:	flo_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value disclosures.

+ References

No definition available.

+ Details

Name:	flo_FairValueDisclosuresLineItems
Namespace Prefix:	flo_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the term in years for distributor notes receivable

+ References

No definition available.

+ Details

Name:	flo_FinancingPeriodOfDistributorNotesReceivable
Namespace Prefix:	flo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the approximate number of independent distributors for the company.

+ References

No definition available.

+ Details

Name:	flo_NumberOfIndependentDistributors
Namespace Prefix:	flo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of down payment on distribution rights purchased.

+ References

No definition available.

+ Details

Name:	flo_PercentageOfDownPaymentOnDistributionRightsPurchased
Namespace Prefix:	flo_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Reserve for distributor notes receivable.

+ References

No definition available.

+ Details

Name:	flo_ReserveForDistributorNotesReceivable
Namespace Prefix:	flo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_LongTermDebtPercentageBearingFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=flo_ThreePointFivePercentSeniorNotesDueTwoThousandTwentySixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=flo_TwoPointFourPercentSeniorNotesDueTwoThousandThirtyOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

Fair Value of Financial Instruments - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended	12 Months Ended
	Oct. 07, 2023 USD ($)	Oct. 09, 2021 USD ($)	Oct. 07, 2023 Distributor	Dec. 31, 2022 Distributor
Fair Value Disclosures [Line Items]
Number of independent distributors \| Distributor			3,200	3,400
Percentage of down payment on distribution rights purchased	5.00%		5.00%
Reserve for distributor notes receivable \| $	$ 14.9	$ 1.9
3.5% Senior Notes Due 2026
Fair Value Disclosures [Line Items]
Derivative, fixed interest rate	3.50%		3.50%
Senior notes due year			2026
2.4 % Senior Notes Due 2031
Fair Value Disclosures [Line Items]
Derivative, fixed interest rate	2.40%		2.40%
Senior notes due year			2031
Maximum
Fair Value Disclosures [Line Items]
Financing period of distribution rights, years			10 years