Goodwill And Intangible Assets (Schedule Of Company's Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Jan. 26, 2013		Oct. 27, 2012
Finite-Lived Intangible Assets
Gross Carrying Value	$ 726,569		$ 700,880
Accumulated Amortization	617,621		591,615
Net Carrying Value	108,948		109,265
Weighted-Average Remaining Useful Life (in years)	1 year 0 months 14 days		1 year 1 month 28 days
Trade Name
Finite-Lived Intangible Assets
Gross Carrying Value	10,901		10,441
Accumulated Amortization	10,466		10,438
Net Carrying Value	435		3
Weighted-Average Remaining Useful Life (in years)	3 years 9 months 4 days		0 years 2 months 1 day
Core/Developed Technology
Finite-Lived Intangible Assets
Gross Carrying Value	338,908		337,858
Accumulated Amortization	302,863		292,083
Net Carrying Value	36,045		45,775
Weighted-Average Remaining Useful Life (in years)	0 years 11 months 19 days		1 year 1 month 20 days
Customer Relationships
Finite-Lived Intangible Assets
Gross Carrying Value	353,860		352,581
Accumulated Amortization	303,877		289,094
Net Carrying Value	49,983		63,487
Weighted-Average Remaining Useful Life (in years)	1 year 0 months 11 days		1 year 1 month 28 days
Non-Compete Agreements
Finite-Lived Intangible Assets
Gross Carrying Value	1,200
Accumulated Amortization	415
Net Carrying Value	785
Weighted-Average Remaining Useful Life (in years)	3 years 9 months 4 days
In-Process Research and Development
Finite-Lived Intangible Assets
Gross Carrying Value	21,700	[1]
Accumulated Amortization	0	[1]
Net Carrying Value	$ 21,700	[1]

[1] Acquired in-process research and development (“IPRD”) is an intangible asset accounted for as an indefinite-lived asset until the completion or abandonment of the associated research and development effort. While accounted as an indefinite-lived asset, the IPRD intangible asset is subject to testing for impairment annually or when there are indicators of impairment. If the IPRD project is successfully completed, then the IPRD intangible asset will be amortized over its estimated useful life to be determined at the date the project is completed. During the three months ended January 26, 2013, the IPRD intangible asset was not amortized due to the current stage of the associated research and development effort.