Goodwill And Intangible Assets (Schedule Of Goodwill Activity By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 26, 2013
Goodwill
Goodwill, Gross, Beginning Balance	$ 1,669,921
Accumulated impairment losses, Beginning Balance	(45,832)
Goodwill, Net, Beginning Balance	1,624,089
Goodwill, Acquired During Period	25,373
Goodwill, Tax and other adjustments	(740)
Goodwill, Gross, Ending Balance	1,694,554
Accumulated impairment losses, Ending Balance	(45,832)
Goodwill, Net, Ending Balance	1,648,722
SAN products
Goodwill
Goodwill, Gross, Beginning Balance	176,956
Accumulated impairment losses, Beginning Balance	0
Goodwill, Net, Beginning Balance	176,956
Goodwill, Acquired During Period	0
Goodwill, Tax and other adjustments	(2)	[1]
Goodwill, Gross, Ending Balance	176,954
Accumulated impairment losses, Ending Balance	0
Goodwill, Net, Ending Balance	176,954
IP Networking products
Goodwill
Goodwill, Gross, Beginning Balance	1,337,549
Accumulated impairment losses, Beginning Balance	(45,832)
Goodwill, Net, Beginning Balance	1,291,717
Goodwill, Acquired During Period	25,373
Goodwill, Tax and other adjustments	(738)	[1]
Goodwill, Gross, Ending Balance	1,362,184
Accumulated impairment losses, Ending Balance	(45,832)
Goodwill, Net, Ending Balance	1,316,352
Global Services
Goodwill
Goodwill, Gross, Beginning Balance	155,416
Accumulated impairment losses, Beginning Balance	0
Goodwill, Net, Beginning Balance	155,416
Goodwill, Acquired During Period	0
Goodwill, Tax and other adjustments	0	[1]
Goodwill, Gross, Ending Balance	155,416
Accumulated impairment losses, Ending Balance	0
Goodwill, Net, Ending Balance	$ 155,416

[1] The goodwill adjustments during the three months ended January 26, 2013 were primarily a result of tax benefits from the exercise of stock awards of acquired companies.