Goodwill And Intangible Assets (Schedule Of Company's Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jan. 28, 2012 years	Oct. 29, 2011 years
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 700,880	$ 700,880
Accumulated Amortization	515,266	486,183
Net Carrying Value	185,614	214,697
Weighted-Average Remaining Useful Life (in years)	1.74	2.08
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	10,441	10,441
Accumulated Amortization	10,426	10,422
Net Carrying Value	15	19
Weighted-Average Remaining Useful Life (in years)	0.92	1.17
Core/Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	337,858	337,858
Accumulated Amortization	259,945	245,855
Net Carrying Value	77,913	92,003
Weighted-Average Remaining Useful Life (in years)	1.71	2.04
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	352,581	352,581
Accumulated Amortization	244,895	229,906
Net Carrying Value	$ 107,686	$ 122,675
Weighted-Average Remaining Useful Life (in years)	1.76	2.12