Goodwill And Intangible Assets (Schedule Of Goodwill Activity By Reportable Segment) (Details) $ in Thousands	3 Months Ended
	Jan. 30, 2016 USD ($)
Goodwill
Goodwill, Gross, Beginning Balance	$ 1,746,375
Accumulated impairment losses, Beginning Balance	(129,214)
Goodwill, Net, Beginning Balance	1,617,161
Goodwill, Tax and other adjustments	(4)	[1]
Goodwill, Translation Adjustments	(116)
Goodwill, Gross, Ending Balance	1,746,255
Accumulated impairment losses, Ending Balance	(129,214)
Goodwill, Net, Ending Balance	1,617,041
Storage Area Networking (“SAN”) Products
Goodwill
Goodwill, Gross, Beginning Balance	176,325
Accumulated impairment losses, Beginning Balance	0
Goodwill, Net, Beginning Balance	176,325
Goodwill, Tax and other adjustments	(4)	[1]
Goodwill, Translation Adjustments	0
Goodwill, Gross, Ending Balance	176,321
Accumulated impairment losses, Ending Balance	0
Goodwill, Net, Ending Balance	176,321
Internet Protocol (“IP”) Networking Products
Goodwill
Goodwill, Gross, Beginning Balance	1,414,634
Accumulated impairment losses, Beginning Balance	(129,214)
Goodwill, Net, Beginning Balance	1,285,420
Goodwill, Tax and other adjustments	0	[1]
Goodwill, Translation Adjustments	(116)
Goodwill, Gross, Ending Balance	1,414,518
Accumulated impairment losses, Ending Balance	(129,214)
Goodwill, Net, Ending Balance	1,285,304
Global Services
Goodwill
Goodwill, Gross, Beginning Balance	155,416
Accumulated impairment losses, Beginning Balance	0
Goodwill, Net, Beginning Balance	155,416
Goodwill, Tax and other adjustments	0	[1]
Goodwill, Translation Adjustments	0
Goodwill, Gross, Ending Balance	155,416
Accumulated impairment losses, Ending Balance	0
Goodwill, Net, Ending Balance	$ 155,416

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