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Lease Modifications and Renewals and Lease Terminations (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 04, 2025	Oct. 05, 2024	Oct. 04, 2025	Oct. 05, 2024
Leases [Abstract]
Lease modifications and renewals	$ 1,945	$ 7,994	$ 12,662	$ 28,630
Lease terminations	$ 157	$ 88	$ 1,038	$ 1,640

X

- Definition

Operating lease modifications and renewals.

+ References

No definition available.

+ Details

Name:	flo_OperatingLeaseModificationsAndRenewals
Namespace Prefix:	flo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of gain (loss) on termination of lease before expiration of lease term.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479092/842-20-40-1

+ Details

Name:	us-gaap_GainLossOnTerminationOfLease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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