Fair Value of Financial Instruments - Additional Information (Detail) - Distributor	4 Months Ended	12 Months Ended
Apr. 24, 2021	Jan. 02, 2021
Fair Value Disclosures [Line Items]
Number of independent distributors	3,900	4,000
Percentage of down payment on distribution rights purchased	5.00%
3.5% Senior Notes Due 2026
Fair Value Disclosures [Line Items]
Derivative, fixed interest rate	3.50%
Senior notes due year	2026
Maximum
Fair Value Disclosures [Line Items]
Financing period of distribution rights, years	10 years

Debt instrument maturity date year.

No definition available.

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- Definition

Fair value disclosures.

+ References

No definition available.

+ Details

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- Definition

Represents the term in years for distributor notes receivable

+ References

No definition available.

+ Details

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- Definition

Represents the approximate number of independent distributors for the company.

+ References

No definition available.

+ Details

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Namespace Prefix:	flo_
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Balance Type:	na
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- Definition

Percentage of down payment on distribution rights purchased.

+ References

No definition available.

+ Details

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- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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- Details

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- Details

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