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		6 Months Ended
	Apr. 28, 2012	Apr. 30, 2011	Apr. 28, 2012	Apr. 30, 2011
Derivative Instruments, Gain (Loss)
Net gains (losses) related to the effective portion of foreign currency derivatives	$ (1,809)	$ 1,856	$ (3,307)	$ 2,525
Cost of revenues
Derivative Instruments, Gain (Loss)
Net gains (losses) related to the effective portion of foreign currency derivatives	(217)	186	(412)	286
Research and development
Derivative Instruments, Gain (Loss)
Net gains (losses) related to the effective portion of foreign currency derivatives	(181)	186	(346)	186
Sales and marketing
Derivative Instruments, Gain (Loss)
Net gains (losses) related to the effective portion of foreign currency derivatives	(1,321)	1,354	(2,384)	1,923
General and administrative
Derivative Instruments, Gain (Loss)
Net gains (losses) related to the effective portion of foreign currency derivatives	$ (90)	$ 130	$ (165)	$ 130