SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Product Warranty (Details) - USD ($) $ in Millions	9 Months Ended
	Jul. 03, 2020	Jun. 28, 2019
Movement in Standard Product Warranty Accrual [Roll Forward]
Accrued product warranty, at beginning of period	$ 8.1	$ 7.3
Charged to cost of revenues	9.7	9.8
Product warranty expenditures	(9.7)	(9.2)
Accrued product warranty, at end of period	$ 8.1	$ 7.9
Minimum
Product Warranty Liability [Line Items]
Warranty term	12 months
Maximum
Product Warranty Liability [Line Items]
Warranty term	24 months