XML 124 R113.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Postretirement Plans - Additional Information (Detail) - USD ($) |  |  | 3 Months Ended | 4 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2018 | Mar. 31, 2018 | Jul. 14, 2018 | Oct. 07, 2017 | Jul. 15, 2017 | Apr. 21, 2018 | Jul. 14, 2018 | Jul. 15, 2017 | Dec. 30, 2017
Compensation And Retirement Disclosure [Abstract] |  |  |  |  |  |  |  |  |
Expected long-term rate of return on plan assets | 5.20% | 6.40% |  |  |  |  |  |  |
Voluntarily contributions made by an employer |  |  | $ 30,000,000 |  |  | $ 10,000,000 |  |  |
Total cost and employer contributions |  |  | 6,200,000 |  | $ 6,600,000 |  | $ 13,500,000 | $ 15,600,000 |
Multiemployer plan, withdrawal obligation |  |  |  | $ 15,200,000 |  |  |  |  | $ 15,223,000
Multiemployer plans, increase in withdrawal obligation |  |  |  |  |  | 2,300,000 |  |  |
Multiemployer plans transition payments payable |  |  | $ 3,100,000 |  |  |  | $ 3,100,000 |  |
Multiemployer plans payable date |  |  |  |  |  |  | Nov. 03, 2017 |  |
Multiemployer plan withdrawal liability of net present value monthly payments period |  |  |  | 20 years |  |  |  |  |
Multiemployer plan, withdrawal obligation paid |  |  |  |  |  | $ 200,000 |  |  |

X
- Definition Multiemployer plan withdrawal liability of net present value monthly payments period. + References No definition available. + Details
Name: | flo_MultiemployerPlanWithdrawalLiabilityOfNetPresentValueMonthlyPaymentsPeriod
Namespace Prefix: | flo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Multiemployer plans tax payments payable date. + References No definition available. + Details
Name: | flo_MultiemployerPlansTaxPaymentsPayableDate
Namespace Prefix: | flo_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Multiemployer plans transition payments payable. + References No definition available. + Details
Name: | flo_MultiemployerPlansTransitionPaymentsPayable
Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Multiemployer plans, withdrawal obligation increase (decrease). + References No definition available. + Details
Name: | flo_MultiemployerPlansWithdrawalObligationIncreaseDecrease
Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Payment of multiemployer plans withdrawal obligation. + References No definition available. + Details
Name: | flo_PaymentOfMultiemployerPlansWithdrawalObligation
Namespace Prefix: | flo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
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
- Definition Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References No definition available. + Details
Name: | us-gaap_MultiemployerPlansWithdrawalObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant