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Carrying Amount of Goodwill by Segment (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended | 4 Months Ended |
--- | --- | --- | --- | ---
Jul. 12, 2014 | Jan. 03, 2015 | Dec. 28, 2013 | Apr. 19, 2014 | Dec. 29, 2012
Goodwill [Line Items] |  |  |  |  |
Beginning balance |  | $ 282,404 us-gaap_Goodwill | $ 269,897 us-gaap_Goodwill | $ 282,404 us-gaap_Goodwill |
Goodwill impairment | (2,600)us-gaap_GoodwillImpairmentLoss | (2,624)us-gaap_GoodwillImpairmentLoss |  |  |
Change in goodwill related to acquisitions |  | 3,180 us-gaap_GoodwillPeriodIncreaseDecrease | 12,507 us-gaap_GoodwillPeriodIncreaseDecrease |  |
Ending balance |  | 282,960 us-gaap_Goodwill | 282,404 us-gaap_Goodwill |  |
DSD Segment |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Beginning balance |  | 277,927 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember | 265,420 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember | 277,927 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember |
Goodwill impairment |  | (2,624)us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember |  |  |
Change in goodwill related to acquisitions |  | 3,180 us-gaap_GoodwillPeriodIncreaseDecrease / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember | 12,507 us-gaap_GoodwillPeriodIncreaseDecrease / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember | 2,600 us-gaap_GoodwillPeriodIncreaseDecrease / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember |
Ending balance |  | 278,483 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember | 277,927 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember |  |
Warehouse Segment |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Beginning balance |  | 4,477 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = flo_WarehouseDeliveryMember |  | 4,477 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = flo_WarehouseDeliveryMember | 4,477 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = flo_WarehouseDeliveryMember
Goodwill impairment |  |  |  |  |
Change in goodwill related to acquisitions |  |  |  |  |
Ending balance |  | $ 4,477 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = flo_WarehouseDeliveryMember |  |  | $ 4,477 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = flo_WarehouseDeliveryMember

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 + Details
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- Definition Amount of loss from the write-down 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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Details
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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 + Details
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |