GOODWILL AND INTANGIBLE ASSETS - Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 29, 2017	Sep. 29, 2017
Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross	$ 141.4	$ 141.4
Accumulated Amortization	(84.6)	(78.6)
Net Carrying Amount	56.8	62.8
Indefinite intangible assets	8.8	8.8
Total intangible assets	150.2	150.2
Total intangible assets, net	65.6	71.6
Technologies and patents
Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross	102.0	102.0
Accumulated Amortization	(65.3)	(60.9)
Net Carrying Amount	36.7	41.1
Customer contracts and supplier relationship
Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross	33.9	33.9
Accumulated Amortization	(15.3)	(14.3)
Net Carrying Amount	18.6	19.6
Other
Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross	5.5	5.5
Accumulated Amortization	(4.0)	(3.4)
Net Carrying Amount	$ 1.5	$ 2.1