Net Share-Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 10,500	$ 11,500	$ 33,900	$ 36,700
Taxes on earnings	(3,181)	(3,728)	(10,359)	(11,776)
Net share-based compensation expense	7,343	7,788	23,556	24,879
Cost of revenues - Product
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	1,058	1,107	3,443	3,351
Cost of revenues - Service contracts and other
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	1,069	317	2,530	1,184
Research and development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	1,515	1,574	4,741	4,833
Selling, general and administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 6,882	$ 8,518	$ 23,201	$ 27,287