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Leases - Additional Information (Detail) - USD ($) $ in Thousands | 4 Months Ended
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Apr. 20, 2024 | Apr. 22, 2023
Lessee Lease Description [Line Items] |  |
Lease modifications and renewals | $ 16,465 | $ 17,348
Freezer Storage Leases |  |
Lessee Lease Description [Line Items] |  |
Lease modifications and renewals | $ 10,600 |

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

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- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |