Basis of Presentation - Additional Information (Detail)		12 Months Ended
	May 03, 2017 BusinessUnit	Dec. 29, 2018 Segment
Disclosure - Basis of Presentation - Additional Information (Detail) [Line Items]
General Information		Flowers Foods is one of the largest producers and marketers of bakery products in the United States. The company currently consists of two business segments: direct-store-delivery (“DSD Segment”) and warehouse delivery (“Warehouse Segment”). The DSD Segment focuses on the production and marketing of bakery products throughout the East, South, Southwest, West Coast, and select markets in the Midwest, Nevada, and Colorado. The Warehouse Segment produces snack cakes, breads and rolls that are shipped both fresh and frozen to national retail, foodservice, vending, and co-pack customers through their warehouse channels.
Number of business segments | Segment		2
Number of new organizational structure business units established | BusinessUnit	2
Full implementation expected period	2019