SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Product Warranty (Details) - USD ($) $ in Millions	6 Months Ended
	Apr. 03, 2020	Mar. 29, 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	7.2	5.2
Product warranty expenditures	(6.9)	(5.7)
Accrued product warranty, at end of period	$ 8.4	$ 6.8
Minimum
Product Warranty Liability [Line Items]
Warranty term	12 months
Maximum
Product Warranty Liability [Line Items]
Warranty term	24 months