GOODWILL AND INTANGIBLE ASSETS - Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 28, 2018	Sep. 28, 2018
Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross	$ 192.1	$ 191.1
Accumulated Amortization	(103.6)	(98.8)
Net Carrying Amount	88.5	92.3
Total intangible assets	200.9	199.9
Total intangible assets, net	97.3	101.1
Technologies and patents
Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross	141.6	139.6
Accumulated Amortization	(77.2)	(73.9)
Net Carrying Amount	64.4	65.7
Customer contracts and supplier relationship
Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross	44.4	44.9
Accumulated Amortization	(20.6)	(19.1)
Net Carrying Amount	23.8	25.8
Other
Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross	6.1	6.6
Accumulated Amortization	(5.8)	(5.8)
Net Carrying Amount	0.3	0.8
In Process Research and Development
Finite Lived Intangible Assets [Line Items]
Indefinite intangible assets	$ 8.8	$ 8.8