EMPLOYEE STOCK PLANS Share-based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2016	Jan. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	$ 2.3	$ 2.1
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	0.2	0.2
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	0.4	0.3
Selling, general and administrative (1)
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	1.7	1.6
Varian | General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	$ 0.8	$ 0.8