SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 01, 2021	Oct. 02, 2020	Sep. 27, 2019
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, and finance lease right-of-use asset, gross	$ 354.8	$ 356.4
Property, plant, and equipment, and finance lease right-of-use asset, accumulated depreciation and amortization	(214.6)	(211.2)
Property, plant, and equipment, net	140.2	145.2
Depreciation	$ 20.5	22.3	$ 23.5
Accelerated depreciation			$ 4.5
Land Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	15 years
Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	30 years
Land
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, and finance lease right-of-use asset, gross	$ 8.3	8.3
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, and finance lease right-of-use asset, gross	148.7	137.2
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, and finance lease right-of-use asset, gross	179.7	175.5
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, and finance lease right-of-use asset, gross	$ 18.1	$ 35.4
Minimum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	3 years
Maximum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	7 years