Leslie's, Inc. Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Summary of Debt Obligations (Parenthetical) (Details)			12 Months Ended
	Apr. 12, 2021	Apr. 11, 2021	Oct. 02, 2021
LIBOR \| Term Loan Due on March 9, 2028 \| Maximum
Debt Instrument [Line Items]
Interest rate range			2.75%
LIBOR \| Term Loan Due on March 9, 2028 \| Minimum
Debt Instrument [Line Items]
Interest rate			0.50%
Interest rate range			2.50%
ABL Credit Facility \| LIBOR \| Maximum
Debt Instrument [Line Items]
Interest rate	0.75%
ABL Credit Facility \| LIBOR \| Minimum
Debt Instrument [Line Items]
Interest rate	0.00%
ABL Credit Facility \| Base Rate \| Maximum
Debt Instrument [Line Items]
Interest rate	0.75%	1.00%	0.75%
ABL Credit Facility \| Base Rate \| Minimum
Debt Instrument [Line Items]
Interest rate	0.25%	0.75%	0.25%
ABL Credit Facility \| Eurodollar \| Maximum
Debt Instrument [Line Items]
Interest rate	1.75%	2.00%	1.75%
ABL Credit Facility \| Eurodollar \| Minimum
Debt Instrument [Line Items]
Interest rate	1.25%	1.75%	1.25%