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Commitments, Contingencies and Leases (Narratives) (Details) (USD $) | 12 Months Ended |  |  |  |  | 3 Months Ended |  | 0 Months Ended | 3 Months Ended |  | 0 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012 | Jul. 03, 2011 | May 05, 2008 Patent Infringement Litigation Versus Extreme Networks Patents | Apr. 09, 2008 Patent Infringement Litigation Versus Extreme Networks Patents | May 30, 2007 Patent Infringement Litigation Versus Extreme Networks Patents | Jun. 21, 2005 Patent Infringement Litigation Versus Extreme Networks Patents | Dec. 31, 2012 Patent Infringement Litigation Versus Enterasys | Jun. 30, 2012 Patent Infringement Litigation Versus Enterasys | May 30, 2008 Patent Infringement Litigation Versus Enterasys Patents | May 30, 2008 Patent Infringement Litigation Versus Enterasys Positive Outcome of Litigation | Jul. 06, 2001 Securities Fraud Class Action Complaints Versus Extreme Networks Employees | Jun. 30, 2012 Pending Litigation Patent Infringement Litigation Versus Chrismar Systems, Inc. | Jun. 30, 2012 Pending Litigation Minimum Patent Infringement Litigation Versus Chrismar Systems, Inc. | Jun. 30, 2012 Pending Litigation Maximum Patent Infringement Litigation Versus Chrismar Systems, Inc. | Jul. 25, 2013 Subsequent Event Patent Infringement Litigation Versus Chrismar Systems, Inc.
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net rent expense | $ 5,900,000 | $ 4,300,000 | $ 4,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cancelable purchase commitments | 50,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of patents owned (in patents) |  |  |  |  |  | 3 | 6 |  |  |  |  |  |  |  |  |
Patents owned in petition for reexamination (in patents) |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |
Patents associated with dismissed litigation (in patents) |  |  |  | 2 | 1 |  | 2 |  |  |  |  |  |  |  |  |
Patents associated with successful litigation (in patents) |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |
Amount awarded by court |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |
Proceeds from legal settlements |  |  |  |  |  |  |  | 400,000 | 600,000 |  |  |  |  |  |  |
Number of current and former employees named in complaint (in employees) |  |  |  |  |  |  |  |  |  |  |  | 6 |  |  |  |
Estimate for range of loss of litigation |  |  |  |  |  |  |  |  |  |  |  |  |  | 300,000 | 1,400,000 |
Amount capitalized for patents subject to litigation |  |  |  |  |  |  |  |  |  |  |  |  | 1,200,000 |  |  |
Recorded estimate for probably loss for litigation |  |  |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |
Amount paid to defendant for patent license fees in settlement agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,400,000

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