Product Warranties - Narrative (Details)	3 Months Ended	12 Months Ended
	Sep. 30, 2024	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Malibu and Axis Brand Boats | Gelcoat
Product Warranty Liability [Line Items]
Standard product warranty, period	1 year
Malibu and Axis Brand Boats | Engines
Product Warranty Liability [Line Items]
Standard product warranty, term, hours	500 hours
Cobalt | Structural Warranty
Product Warranty Liability [Line Items]
Standard product warranty, period	5 years
Cobalt | Bow-to-stern
Product Warranty Liability [Line Items]
Standard product warranty, period		5 years	3 years
Saltwater Fishing | Bow-to-stern
Product Warranty Liability [Line Items]
Standard product warranty, period	2 years
Maverick, Pathfinder, and Hewes Brand Boats | Bow-to-stern
Product Warranty Liability [Line Items]
Standard product warranty, period	1 year
Cobia | Bow-to-stern
Product Warranty Liability [Line Items]
Standard product warranty, period	3 years
Malibu Brand Boats
Product Warranty Liability [Line Items]
Standard product warranty, period				5 years	3 years
Axis Boats
Product Warranty Liability [Line Items]
Standard product warranty, period				5 years	2 years
Maximum | Malibu and Axis Brand Boats
Product Warranty Liability [Line Items]
Standard product warranty, period	5 years
Maximum | Malibu and Axis Brand Boats | Engines
Product Warranty Liability [Line Items]
Standard product warranty, period	5 years
Maximum | Cobalt | Structural Warranty
Product Warranty Liability [Line Items]
Standard product warranty, period	10 years
Maximum | Cobalt | Gelcoat
Product Warranty Liability [Line Items]
Standard product warranty, period	3 years
Maximum | Saltwater Fishing | Structural Warranty And Gelcoat
Product Warranty Liability [Line Items]
Standard product warranty, period	5 years
Maximum | Maverick, Pathfinder, and Hewes Brand Boats | Structural Warranty And Gelcoat
Product Warranty Liability [Line Items]
Standard product warranty, period	5 years
Maximum | Cobia | Structural Warranty And Gelcoat
Product Warranty Liability [Line Items]
Standard product warranty, period	10 years