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Supply Chain Finance (Details) - USD ($) $ in Millions	Mar. 30, 2023	Dec. 29, 2022
Payables and Accruals [Abstract]
Supplier finance program obligation	$ 104.1	$ 82.5

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- Definition

Supplier Finance Program Obligation

+ References

No definition available.

+ Details

Name:	fnd_SupplierFinanceProgramObligation
Namespace Prefix:	fnd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration