Goodwill And Intangible Assets (Schedule Of Goodwill Activity By Reportable Segment) (Details) $ in Thousands	9 Months Ended
	Jul. 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
Acquisitions (1)	707,392	[1]
Goodwill, Tax and other adjustments	(5)	[2]
Goodwill, Translation Adjustments	(233)
Goodwill, Gross, Ending Balance	2,453,529
Accumulated impairment losses, Ending Balance	(129,214)
Goodwill, Net, Ending Balance	2,324,315
Storage Area Networking (“SAN”) Products
Goodwill
Goodwill, Gross, Beginning Balance	176,325
Accumulated impairment losses, Beginning Balance	0
Goodwill, Net, Beginning Balance	176,325
Acquisitions (1)	0	[1]
Goodwill, Tax and other adjustments	(5)	[2]
Goodwill, Translation Adjustments	0
Goodwill, Gross, Ending Balance	176,320
Accumulated impairment losses, Ending Balance	0
Goodwill, Net, Ending Balance	176,320
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
Acquisitions (1)	308,456	[1]
Goodwill, Tax and other adjustments	0	[2]
Goodwill, Translation Adjustments	(233)
Goodwill, Gross, Ending Balance	1,722,857
Accumulated impairment losses, Ending Balance	(129,214)
Goodwill, Net, Ending Balance	1,593,643
Global Services
Goodwill
Goodwill, Gross, Beginning Balance	155,416
Accumulated impairment losses, Beginning Balance	0
Goodwill, Net, Beginning Balance	155,416
Acquisitions (1)	398,936	[1]
Goodwill, Tax and other adjustments	0	[2]
Goodwill, Translation Adjustments	0
Goodwill, Gross, Ending Balance	554,352
Accumulated impairment losses, Ending Balance	0
Goodwill, Net, Ending Balance	$ 554,352

[1] The goodwill acquired relates to the acquisitions completed in March 2016 and May 2016. See Note 3, “Acquisitions,” of the Notes to Condensed Consolidated Financial Statements.

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