Acquisitions Acquisitions (Schedule of Intangible Assets Acquired as Part of Business Combination) (Details) - USD ($) $ in Thousands		3 Months Ended
		Jul. 30, 2016	Jan. 28, 2017	Oct. 29, 2016	May 27, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)			$ 25,000	$ 24,000
In Process Research and Development [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	[1]		$ 25,000	$ 24,000
Ruckus
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets					$ 418,000
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					28,000
Ruckus | Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles					42,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		11 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
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles					$ 230,000
Ruckus | Core/developed technology | Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		6 years
Ruckus | Core/developed technology | Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		7 years

[1] Acquired IPR&D is an intangible asset accounted for as an indefinite-lived asset until the completion or abandonment of the associated research and development effort. If the research and development effort associated with the IPR&D is successfully completed, then the IPR&D intangible asset will be amortized over its estimated useful life to be determined at the date the effort is completed.