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Lease Modifications and Renewals and Lease Terminations (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 07, 2023 | Oct. 08, 2022 | Oct. 07, 2023 | Oct. 08, 2022
Leases [Abstract] |  |  |  |
Lease modifications and renewals | $ 3,820 | $ 3,353 | $ 28,585 | $ 22,007
Lease terminations | $ 71 | $ 155 | $ 277 | $ 5,883

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