Other Accrued Liabilities and Other Long-term Liabilities - Additional Information (Detail) $ in Millions	Jan. 01, 2022 USD ($) DistributionTerritory
Other Liabilities Disclosure [Abstract]
Business combination, estimated cost owed to shareholders \| $	$ 3.4
Number of distribution territories repurchased \| DistributionTerritory	75

Business combination, estimated cost owed to shareholders.

No definition available.

Name:	flo_BusinessCombinationEstimatedCostOwedToShareholders
Namespace Prefix:	flo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant