Accounts Payable and Accrued Expenses (Additional Information) (Details) - USD ($) $ in Millions	Jul. 01, 2023	Oct. 01, 2022	Jul. 02, 2022
Payables and Accruals [Abstract]
Capital expenditures included in other accrued liabilities	$ 0.9	$ 1.1	$ 0.3

Capital expenditures included in other accrued liabilities current.

No definition available.

Name:	lesl_CapitalExpendituresIncludedInOtherAccruedLiabilitiesCurrent
Namespace Prefix:	lesl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant