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Changes to Goodwill From Acquisition (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012	Jul. 19, 2013
Goodwill [Line Items]
Beginning balance		$ 282,404us-gaap_Goodwill	$ 269,897us-gaap_Goodwill
Ending balance	282,960us-gaap_Goodwill	282,404us-gaap_Goodwill	269,897us-gaap_Goodwill
Acquired Hostess Bread Asset
Goodwill [Line Items]
Beginning balance	5,419us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = flo_AcquiredHostessAssetsMember			8,599us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = flo_AcquiredHostessAssetsMember
Net changes to goodwill	3,180us-gaap_GoodwillPurchaseAccountingAdjustments / us-gaap_BusinessAcquisitionAxis = flo_AcquiredHostessAssetsMember
Ending balance	8,599us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = flo_AcquiredHostessAssetsMember			8,599us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = flo_AcquiredHostessAssetsMember
Acquired Hostess Bread Asset | Spare parts and final fair value adjustments
Goodwill [Line Items]
Net changes to goodwill	(3,503)us-gaap_GoodwillPurchaseAccountingAdjustments / us-gaap_BusinessAcquisitionAxis = flo_AcquiredHostessAssetsMember / us-gaap_FairValueByAssetClassAxis = flo_SparePartsMember
Acquired Hostess Bread Asset | Property, plant and equipment final fair value adjustments
Goodwill [Line Items]
Net changes to goodwill	$ 6,683us-gaap_GoodwillPurchaseAccountingAdjustments / us-gaap_BusinessAcquisitionAxis = flo_AcquiredHostessAssetsMember / us-gaap_FairValueByAssetClassAxis = us-gaap_PropertyPlantAndEquipmentMember

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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X

- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 16

-URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e961-128460

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