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Acquisitions (Narrative) (Details) (Vyatta, USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jan. 26, 2013
May 03, 2014
Vyatta
   
Business Acquisition    
Effective Date of Acquisition   Nov. 09, 2012
Acquisition Cost Expensed $ 0.4  
Consideration Paid Held In Escrow, Amount   7.0
Consideration Paid Held In Escrow, Escrow Duration   18 months
Business Combination, Consideration Transferred    
Cash consideration 43.6  
Prepaid license fees consideration 1.2  
Total purchase price $ 44.8