Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

GOODWILL AND INTANGIBLE ASSETS - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Finite-Lived Intangible Assets [Line Items]
Impairment charges		$ 50.5
Amortization expense			$ 17.4	$ 15.2
Continuing Operations
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 6.0	4.8	$ 17.4	$ 15.2
Proton Solutions
Finite-Lived Intangible Assets [Line Items]
Impairment charges		$ 50.5