BALANCE SHEET COMPONENTS - Available-for-Sale Securities (Detail) - USD ($) $ in Millions	Apr. 01, 2016	Oct. 02, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 88.8	$ 93.2
Gross Unrealized Gains	0.0	0.1
Gross Unrealized Losses	0.0	(0.3)
Fair Value	88.8	93.0
CPTC loans
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	88.8	83.9
Gross Unrealized Gains	0.0	0.0
Gross Unrealized Losses	0.0	0.0
Fair Value	$ 88.8	83.9
Other
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		8.6
Gross Unrealized Gains		0.1
Gross Unrealized Losses		(0.3)
Fair Value		8.4
Non-U.S. government security
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		0.7
Gross Unrealized Gains		0.0
Gross Unrealized Losses		0.0
Fair Value		$ 0.7