Other Accrued Liabilities and Other Long-term Liabilities - Additional Information (Detail) $ in Millions	6 Months Ended
Jul. 15, 2023 USD ($)
Other Liabilities Disclosure [Abstract]
Sellers owed additional taxes	$ 3.4

Business combination selling owed additional taxes.

No definition available.

Name:	flo_BusinessCombinationSellingOwedAdditionalTaxes
Namespace Prefix:	flo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration