GOODWILL AND INTANGIBLE ASSETS - Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Millions	Jun. 29, 2018	Sep. 29, 2017
Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross	$ 164.0	$ 141.4
Accumulated Amortization	(93.4)	(78.6)
Net Carrying Amount	70.6	62.8
Total intangible assets	172.8	150.2
Total intangible assets, net	79.4	71.6
Technologies and patents
Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross	115.5	102.0
Accumulated Amortization	(70.6)	(60.9)
Net Carrying Amount	44.9	41.1
Customer contracts and supplier relationship
Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross	42.8	33.9
Accumulated Amortization	(17.6)	(14.3)
Net Carrying Amount	25.2	19.6
Other
Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross	5.7	5.5
Accumulated Amortization	(5.2)	(3.4)
Net Carrying Amount	0.5	2.1
In Process Research and Development
Finite Lived Intangible Assets [Line Items]
Indefinite intangible assets	$ 8.8	$ 8.8