Assets Held for Sale - Additional Information (Detail)	4 Months Ended
Apr. 18, 2020 Bakery
Property Plant And Equipment [Abstract]
Number of closed bakeries reclassified as held for sale	2

Number of closed bakeries reclassified as held for sale.

No definition available.

Name:	flo_NumberOfClosedBakeriesReclassifiedAsHeldForSale
Namespace Prefix:	flo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration