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Basis of Presentation - Additional Information (Detail) (USD $)
 4 Months Ended 1 Months Ended
Apr. 20, 2013
Segment
Feb. 23, 2013
Sara Lee and Earthgrains acquisition of trademark licenses
Jan. 11, 2013
Hostess
Agreement One
Jan. 11, 2013
Hostess
Agreement Two
Jan. 11, 2013
Hostess
Bakeries
Agreement One
Facility
Jan. 11, 2013
Hostess
Depots
Agreement One
Facility
Basis of Presentation [Line Items]            
Segment reporting, description SEGMENTS — Flowers Foods currently operates two business segments: a direct-store-delivery segment (“DSD segment”) and a warehouse delivery segment (“warehouse segment”). The DSD segment (82% of total sales) operates 35 bakeries that market a wide variety of fresh bakery foods, including fresh breads, buns, rolls, tortillas, and snack cakes. These products are sold through a DSD route delivery system to retail and foodservice customers in the Southeast, Mid-Atlantic, New England, and Southwest as well as in select markets in California and Nevada. The warehouse segment (18% of total sales) operates 9 bakeries that produce snack cakes and breads and rolls for national retail, foodservice, vending, and co-pack customers and deliver through customers’ warehouse channels. The warehouse segment also operates one mix facility.          
Number of business segments 2          
Business acquisition   $ 49,950,000        
Number of assets acquired in acquisition         20 38
Aggregate purchase price     360,000,000 30,000,000    
Breakup fee received for unsuccessful bid       900,000    
Payment made for bid       $ 18,000,000