Payout Percentage of Total Shareholder Return Shares (Detail)	12 Months Ended
Jan. 01, 2022
Total Shareholders Return \| 2017 Award \| Fiscal 2019
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Equity Instruments Other Than Options Restricted Stock Units [Line Items]
Payout percentage	153.00%

Schedule of share based compensation arrangements by share based payment award, equity instruments, other than options, restricted stock units.

No definition available.

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Namespace Prefix:	flo_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration