Basis of Presentation - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended	1 Months Ended
	May 22, 2013	Jul. 13, 2013 Segment	Feb. 25, 2013 Sara Lee and Earthgrains acquisition of trademark licenses	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	Jul. 19, 2013 Hostess Subsequent Event	Jul. 19, 2013 Hostess Subsequent Event Agreement One
Basis of Presentation [Line Items]
Stock split, ratio	1.5	1.5
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 36 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		$ 18,000,000	$ 50,000,000	$ 49,950,000
Number of assets acquired in acquisition							20	38
Aggregate purchase price				42,350,000	360,000,000	30,000,000			355,000,000	355,000,000
Breakup fee received for unsuccessful bid						900,000
Payment made for bid						$ 18,000,000