XML 26 R161.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Benefits Expected to be Paid from Plans Assets (Parenthetical) (Detail) - Includes Plan No 1 and No 2 Single Lump Sum - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Lump Sums Plan No. 1 |  |  |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |  |  |
Distributions from existing plan assets |  |  | $ 14.4
Lump Sums Plan No. 1 |  |  |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |  |  |
Distributions from existing plan assets |  | $ 24.9 |
Lump Sums Plan No. 1 |  |  |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |  |  |
Distributions from existing plan assets | $ 7.0 |  |
Lump Sums Plan No. 2 |  |  |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |  |  |
Distributions from existing plan assets |  |  | $ 1.6
Lump Sums Plan No. 2 |  |  |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |  |  |
Distributions from existing plan assets |  | $ 1.5 |
Lump Sums Plan No. 2 |  |  |
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] |  |  |
Distributions from existing plan assets | $ 0.7 |  |

X
- Definition Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items] + References No definition available. + Details
Name: | flo_ScheduleOfPensionAndOtherPostretirementBenefitsExpectedBenefitPaymentsLineItems
Namespace Prefix: | flo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(5) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=flo_LumpSumsPlanOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=flo_LumpSumsPlanTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |