Derivative Instruments And Hedging Activities (Schedule Of Net Gains (Losses) Related To The Effective Portion Of Foreign Currency Derivatives) (Details) (Foreign Exchange Contract, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 26, 2013	Jan. 28, 2012
Derivative Instruments, Gain (Loss)
Net gains (losses) related to the effective portion of foreign currency derivatives	$ 202	$ (1,498)
Cost of revenues
Derivative Instruments, Gain (Loss)
Net gains (losses) related to the effective portion of foreign currency derivatives	33	(195)
Research and development
Derivative Instruments, Gain (Loss)
Net gains (losses) related to the effective portion of foreign currency derivatives	(5)	(165)
Sales and marketing
Derivative Instruments, Gain (Loss)
Net gains (losses) related to the effective portion of foreign currency derivatives	166	(1,063)
General and administrative
Derivative Instruments, Gain (Loss)
Net gains (losses) related to the effective portion of foreign currency derivatives	$ 8	$ (75)