Acquisitions Acquisitions (Schedule of Intangible Assets Acquired as Part of Business Combination) (Details) - USD ($) $ in Thousands		3 Months Ended
		Jul. 30, 2016	May 27, 2016	Oct. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)		$ 21,000		$ 15,110
In Process Research and Development [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	[1]	$ 21,000		$ 15,110
Ruckus
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets			$ 380,000
Ruckus | In Process Research and Development [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets			23,000
Ruckus | Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			44,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years
Ruckus | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			118,000
Ruckus | Customer relationships | Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		1 year
Ruckus | Customer relationships | Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		7 years
Ruckus | Core/developed technology (1) (2)
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 195,000
Ruckus | Core/developed technology (1) (2) | Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		6 years
Ruckus | Core/developed technology (1) (2) | Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		7 years

[1] Acquired IPR&D are intangible assets accounted for as indefinite-lived assets until the completion or abandonment of the associated research and development efforts. If the research and development efforts associated with the IPR&D are successfully completed, then the IPR&D intangible assets will be amortized over the estimated useful lives to be determined as of the date the efforts are completed. During the three months ended July 30, 2016, the Company acquired $23.0 million in IPR&D intangible assets in connection with the acquisition of Ruckus. The research and development efforts associated with these IPR&D intangible assets are expected to be completed in fiscal years 2016 and 2017. During the nine months ended July 30, 2016, research and development efforts were completed on $17.1 million of the IPR&D intangible assets, and the completed IPR&D intangible assets are being amortized as core/developed technology over the estimated useful lives of five to seven years.