Derivative Instruments And Hedging Activities (Schedule Of Net Gains (Losses) Related To The Effective Portion Of Foreign Currency Derivatives) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 28, 2012	Jan. 29, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) related to the effective portion of foreign currency derivatives	$ (1,498)	$ 669
Cost Of Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) related to the effective portion of foreign currency derivatives	(195)	100
Research And Development [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) related to the effective portion of foreign currency derivatives	(165)
Sales And Marketing [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) related to the effective portion of foreign currency derivatives	(1,063)	569
General And Administrative [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) related to the effective portion of foreign currency derivatives	$ (75)