Goodwill And Intangible Assets (Schedule Of Goodwill Activity By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 01, 2014		Oct. 26, 2013		Oct. 27, 2012
Goodwill
Goodwill, Gross, Beginning Balance	$ 1,691,269		$ 1,669,921
Accumulated impairment losses, Beginning Balance	(45,832)		(45,832)
Goodwill, Net, Beginning Balance	1,645,437		1,624,089
Goodwill, Impairment Loss	(83,382)		0		0
Goodwill, Written off Related to Sale of Business Unit	(4,131)
Goodwill, Acquired During Period	11,475		25,681
Goodwill, Tax and other adjustments	(1,676)	[1]	(4,333)	[1]
Goodwill, Gross, Ending Balance	1,696,937		1,691,269		1,669,921
Accumulated impairment losses, Ending Balance	(129,214)		(45,832)		(45,832)
Goodwill, Net, Ending Balance	1,567,723		1,645,437		1,624,089
SAN Products
Goodwill
Goodwill, Gross, Beginning Balance	176,878		176,956
Accumulated impairment losses, Beginning Balance	0		0
Goodwill, Net, Beginning Balance	176,878		176,956
Goodwill, Impairment Loss	0
Goodwill, Written off Related to Sale of Business Unit	(474)
Goodwill, Acquired During Period	0		0
Goodwill, Tax and other adjustments	(58)	[1]	(78)	[1]
Goodwill, Gross, Ending Balance	176,346		176,878
Accumulated impairment losses, Ending Balance	0		0
Goodwill, Net, Ending Balance	176,346		176,878
IP Networking Products
Goodwill
Goodwill, Gross, Beginning Balance	1,358,975		1,337,549
Accumulated impairment losses, Beginning Balance	(45,832)		(45,832)
Goodwill, Net, Beginning Balance	1,313,143		1,291,717
Goodwill, Impairment Loss	(83,382)
Goodwill, Written off Related to Sale of Business Unit	(3,657)
Goodwill, Acquired During Period	11,475		25,681
Goodwill, Tax and other adjustments	(1,618)	[1]	(4,255)	[1]
Goodwill, Gross, Ending Balance	1,365,175		1,358,975
Accumulated impairment losses, Ending Balance	(129,214)		(45,832)
Goodwill, Net, Ending Balance	1,235,961		1,313,143
Global Services
Goodwill
Goodwill, Gross, Beginning Balance	155,416		155,416
Accumulated impairment losses, Beginning Balance	0		0
Goodwill, Net, Beginning Balance	155,416		155,416
Goodwill, Impairment Loss	0
Goodwill, Written off Related to Sale of Business Unit	0
Goodwill, Acquired During Period	0		0
Goodwill, Tax and other adjustments	0	[1]	0	[1]
Goodwill, Gross, Ending Balance	155,416		155,416
Accumulated impairment losses, Ending Balance	0		0
Goodwill, Net, Ending Balance	$ 155,416		$ 155,416

[1] The goodwill adjustments were primarily a result of tax benefits from the exercise of stock awards of acquired companies.