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Lease Modifications and Renewals and Lease Terminations (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 12, 2025 | Jul. 13, 2024 | Jul. 12, 2025 | Jul. 13, 2024
Leases [Abstract] |  |  |  |
Lease modifications and renewals | $ 3,738 | $ 4,171 | $ 10,717 | $ 20,637
Lease terminations | $ 826 | $ 221 | $ 881 | $ 1,551

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- Definition Operating lease modifications and renewals. + References No definition available. + Details
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Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration