Acquisitions (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands		3 Months Ended		6 Months Ended
		Apr. 29, 2017	Apr. 30, 2016	Apr. 29, 2017	Apr. 30, 2016	Oct. 29, 2016	May 27, 2016
Business Acquisition [Line Items]
Common stock, shares outstanding		409,865		409,865		401,748
Acquisition, divestiture, and integration costs		$ 18,236,000	$ 5,757,000	$ 36,273,000	$ 5,757,000
Goodwill		2,291,246,000		2,291,246,000		$ 2,295,184,000
Goodwill, Purchase Accounting Adjustments	[1]			(3,938,000)
IP Networking Products
Business Acquisition [Line Items]
Goodwill		1,639,609,000		1,639,609,000		1,569,427,000
Goodwill, Purchase Accounting Adjustments	[1]			70,182,000
Global Services
Business Acquisition [Line Items]
Goodwill		475,317,000		475,317,000		$ 549,437,000
Goodwill, Purchase Accounting Adjustments	[1]			(74,120,000)
Ruckus
Business Acquisition [Line Items]
Common stock, shares outstanding							92,200
Share Price							$ 8.60
Total purchase consideration (b)				1,275,060,000
Business Combination, Integration Related Costs				3,710,000
Goodwill							$ 669,810,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount							0
Goodwill, Purchase Accounting Adjustments				3,900,000
Ruckus | Acquisition Costs [Member]
Business Acquisition [Line Items]
Acquisition, divestiture, and integration costs		$ 1,374,000		$ 2,270,000
Ruckus | IP Networking Products
Business Acquisition [Line Items]
Goodwill							350,200,000
Ruckus | Global Services
Business Acquisition [Line Items]
Goodwill							$ 319,600,000
Shares Dissented [Member] | Ruckus
Business Acquisition [Line Items]
Common stock, shares outstanding							3,200

[1] For the measurement period adjustments recorded in connection with the acquisition of Ruckus, see Note 3, “Acquisitions,” of the Notes to Condensed Consolidated Financial Statements.