Acquisitions (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands		3 Months Ended
		Jan. 28, 2017	Jan. 30, 2016	Oct. 29, 2016	May 27, 2016
Business Acquisition [Line Items]
Common stock, shares outstanding		407,514		401,748
Acquisition and integration costs		$ 18,037,000	$ 0
Goodwill		2,290,205,000		$ 2,295,184,000
Goodwill, Purchase Accounting Adjustments	[1]	4,979,000
IP Networking Products
Business Acquisition [Line Items]
Goodwill		1,639,064,000		1,569,427,000
Goodwill, Purchase Accounting Adjustments		69,637,000
Global Services
Business Acquisition [Line Items]
Goodwill		474,821,000		$ 549,437,000
Goodwill, Purchase Accounting Adjustments		(74,616,000)
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		$ 3,872,000
Goodwill					$ 668,770,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount					0
Business Combination, Provisional Information, Initial Accounting Incomplete, Items		The total purchase consideration allocation reflects the Company’s preliminary estimates and is subject to revision as additional information in relation to the tax liabilities becomes available during the remainder of the measurement period. This period is not to exceed 12 months from the acquisition date.
Goodwill, Purchase Accounting Adjustments		$ 5,000,000
Ruckus | Acquisition Costs [Member]
Business Acquisition [Line Items]
Acquisition and integration costs		$ 897,000
Ruckus | IP Networking Products
Business Acquisition [Line Items]
Goodwill					349,400,000
Ruckus | Global Services
Business Acquisition [Line Items]
Goodwill					$ 319,400,000
Shares Dissented [Member] | Ruckus
Business Acquisition [Line Items]
Common stock, shares outstanding					3,200

[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjJjOTBlMDdkZDAwMjQ3OGY5N2UxOWY1YzM5Njg0NDgwfFRleHRTZWxlY3Rpb246RkM2MjZDRDdDMEQxMTZBQTczOTE2MzdDRTcyNzY5RjcM}