Business Combinations (Schedule of Finite-Lived Intangible Assets Acquired) (Details) - Oct. 31, 2013 - Enterasys Networks, Inc. - USD ($) $ in Thousands	Total
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	3 years
Amount	$ 108,900
Developed Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	3 years
Amount	$ 45,000
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	3 years
Amount	$ 37,000
Maintenance Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	5 years
Amount	$ 17,000
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	3 years
Amount	$ 2,500
Order Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	1 year
Amount	$ 7,400