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Commitments, Contingencies and Leases (Narratives) (Details) BRL in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2016 USD ($) | Jun. 30, 2016 BRL | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Jun. 30, 2016 BRL | Mar. 31, 2014 USD ($) | Mar. 31, 2014 BRL
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Net rent expense | $ 8,500,000 |  | $ 11,100,000 | $ 10,200,000 |  |  |
Non-cancelable purchase commitments | 63,700,000 |  |  |  |  |  |
Accrual acquisition liability related to matter before acquisition of Enterasys Networks | 2,900,000 |  |  |  | BRL 9.4 |  |
Foreign |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Value of tax credits disallowed |  |  |  |  |  | $ 1,000,000 | BRL 3.4
Estimated interest and penalties | 5,100,000 | BRL 16.6 |  |  |  |  |
Foreign | Maximum |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Potential total tax liability | 7,300,000 | 24.0 |  |  |  |  |
Foreign | The State of Sao Paolo, Enterasys Networks do Brazil Ltda. |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Estimated court fees | $ 1,200,000 | BRL 4.0 |  |  |  |  |

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