XML 51 R107.htm IDEA: XBRL DOCUMENT
v3.20.1

Postretirement Plans - Additional Information (Detail) - USD ($) | 3 Months Ended | 4 Months Ended |
--- | --- | --- | ---
Oct. 03, 2020 | Apr. 18, 2020 | Apr. 20, 2019 | Mar. 31, 2020
Plan No. 1 |  |  |  |
Pension and Other Postretirement Benefits Disclosure [Line Items] |  |  |  |
Defined benefit plan assets, transferred |  | $ 6,400,000 |  |
Voluntarily contributions made by an employer |  | 1,400,000 | $ 0 |
Defined benefit plan, loan issued |  | 5,000,000.0 |  | $ 5,000,000.0
Defined benefit plans non-cash settlement charge |  | 116,200,000 |  |
Settlement loss |  | 111,900,000 | 0 |
Defined benefit plan obligation, curtailment loss |  | 4,300,000 |  |
Plan No. 2 | Scenario Forecast |  |  |  |
Pension and Other Postretirement Benefits Disclosure [Line Items] |  |  |  |
Voluntarily contributions made by an employer | $ 2,500,000 |  |  |
401(k) Retirement Savings Plans |  |  |  |
Pension and Other Postretirement Benefits Disclosure [Line Items] |  |  |  |
Total cost and employer contributions |  | $ 8,600,000 | $ 8,500,000 |

X
- Definition Defined benefit plan amount transferred in cash for lumpsum payments and purchases. + References No definition available. + Details
Name: | flo_DefinedBenefitPlanAmountTransferredInCashForLumpsumPaymentsAndPurchases
Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Defined benefit plan non cash pension termination charges. + References No definition available. + Details
Name: | flo_DefinedBenefitPlanNonCashPensionTerminationCharges
Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Pension and other postretirement benefits disclosure. + References No definition available. + Details
Name: | flo_PensionAndOtherPostretirementBenefitsDisclosureLineItems
Namespace Prefix: | flo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Pension plan loan issued in period amount. + References No definition available. + Details
Name: | flo_PensionPlanLoanIssuedInPeriodAmount
Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from event reducing expected years of future service of present employees or eliminating accrual of defined benefits for some or all future services of present employees. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(7) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
Name: | us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(7) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
Name: | us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=flo_PlanOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=flo_PlanTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=flo_FourZeroOneKRetirementSavingsPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |