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Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended		3 Months Ended		4 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Jul. 13, 2013	Dec. 28, 2013	Apr. 19, 2014
Goodwill and Intangible Assets Disclosure [Line Items]
Change in goodwill	$ 3,180us-gaap_GoodwillPeriodIncreaseDecrease	$ 12,507us-gaap_GoodwillPeriodIncreaseDecrease
Additional indefinite lived intangible assets separately identified from goodwill	455,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill	455,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill		455,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Reclassification from property plant and equipment to goodwill
Goodwill and Intangible Assets Disclosure [Line Items]
Change in goodwill			1,100us-gaap_GoodwillPeriodIncreaseDecrease / flo_PriorPeriodReclassificationAdjustmentsAxis = flo_ReclassificationFromPropertyAndEquipmentToOtherAssetsMember
Reclassification from accrued liabilities to goodwill
Goodwill and Intangible Assets Disclosure [Line Items]
Change in goodwill				900us-gaap_GoodwillPeriodIncreaseDecrease / flo_PriorPeriodReclassificationAdjustmentsAxis = flo_ReclassificationsMember
DSD Segment
Goodwill and Intangible Assets Disclosure [Line Items]
Change in goodwill	3,180us-gaap_GoodwillPeriodIncreaseDecrease / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember	12,507us-gaap_GoodwillPeriodIncreaseDecrease / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember			2,600us-gaap_GoodwillPeriodIncreaseDecrease / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember
Trademarks
Goodwill and Intangible Assets Disclosure [Line Items]
Additional indefinite lived intangible assets separately identified from goodwill	$ 455,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember	$ 455,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember		$ 455,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember

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- Definition

Amount of increase (decrease) 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

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- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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