Goodwill And Intangible Assets (Schedule Of Company's Intangible Assets) (Details) (USD $)	9 Months Ended		12 Months Ended
	Jul. 27, 2013		Oct. 27, 2012
Finite-Lived Intangible Assets
Gross Carrying Value	$ 502,290,000	[1]	$ 546,710,000
Accumulated Amortization	439,258,000	[1]	437,445,000
Net Carrying Value	63,032,000	[1]	109,265,000
Weighted-Average Remaining Useful Life (in years)	0 years 7 months 13 days		1 year 1 month 28 days
Cost of Fully Amortized Intangible Assets	69,400,000
Trade name
Finite-Lived Intangible Assets
Gross Carrying Value	460,000		100,000
Accumulated Amortization	82,000		97,000
Net Carrying Value	378,000		3,000
Weighted-Average Remaining Useful Life (in years)	3 years 3 months 4 days		0 years 2 months 1 day
Core/developed technology
Finite-Lived Intangible Assets
Gross Carrying Value	192,340,000		218,845,000
Accumulated Amortization	175,604,000		173,070,000
Net Carrying Value	16,736,000		45,775,000
Weighted-Average Remaining Useful Life (in years)	0 years 6 months 0 days		1 year 1 month 20 days
Customer relationships
Finite-Lived Intangible Assets
Gross Carrying Value	287,090,000		327,765,000
Accumulated Amortization	263,427,000		264,278,000
Net Carrying Value	23,663,000		63,487,000
Weighted-Average Remaining Useful Life (in years)	0 years 7 months 2 days		1 year 1 month 28 days
Non-compete agreements
Finite-Lived Intangible Assets
Gross Carrying Value	810,000
Accumulated Amortization	145,000
Net Carrying Value	665,000
Weighted-Average Remaining Useful Life (in years)	3 years 3 months 4 days
In-Process Research and Development
Finite-Lived Intangible Assets
Gross Carrying Value	21,590,000	[2]
Accumulated Amortization	0	[2]
Net Carrying Value	$ 21,590,000	[2]

[1] During the nine months ended July 27, 2013, $69.4 million of intangible assets became fully amortized and, therefore, were removed from the balance sheet.

[2] 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, as of the first day of the second fiscal quarter, and whenever events or changes in facts and circumstances indicate that it is more likely than not that IPRD is impaired. If the research and development effort associated with the IPRD is successfully completed, then the IPRD intangible asset will be amortized over its estimated useful life to be determined at the date the effort is completed. During the nine months ended July 27, 2013, the IPRD intangible asset was not amortized due to the current stage of the associated research and development effort.