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Summary of Company's Stock Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock based compensation	$ 18,662us-gaap_AllocatedShareBasedCompensationExpense	$ 15,943us-gaap_AllocatedShareBasedCompensationExpense	$ 10,116us-gaap_AllocatedShareBasedCompensationExpense
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock based compensation	197us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember	1,776us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember	3,374us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember
Performance Contingent Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock based compensation	16,544us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = flo_PerformanceContingentRestrictedStockMember	11,180us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = flo_PerformanceContingentRestrictedStockMember	4,615us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = flo_PerformanceContingentRestrictedStockMember
Deferred Stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock based compensation	2,176us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = flo_DeferredStockMember	1,769us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = flo_DeferredStockMember	1,384us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = flo_DeferredStockMember
Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock based compensation	$ (255)us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = flo_StockAppreciationRightsMember	$ 1,218us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = flo_StockAppreciationRightsMember	$ 743us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = flo_StockAppreciationRightsMember

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

+ Details

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Balance Type:	debit
Period Type:	duration

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- Details

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- Details

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X

- Details

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X

- Details

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- Details

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