Income Taxes	9 Months Ended
Mar. 26, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The variation between the Company's effective income tax rate and the U.S. statutory rate of 35% is primarily due to: (i) changes in the Company’s valuation allowances against deferred tax assets in the U.S. and Luxembourg, (ii) projected income for the full year derived from international locations with lower tax rates than the U.S. and (iii) projected tax credits generated. U.S. GAAP requires a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is cumulatively more than 50% likely to be realized upon ultimate settlement. As of June 26, 2016, the Company's liability for unrecognized tax benefits was $17.7 million. During the nine months ended March 26, 2017, the Company released $4.3 million of its unrecognized tax benefits; $3.7 million following statute expirations, and $0.6 million related to settlement of the audit by the Italian Revenue Agency. As a result, the total liability for unrecognized tax benefits as of March 26, 2017 was $13.4 million. If any portion of this $13.4 million is recognized, the Company will then include that portion in the computation of its effective tax rate. Although the ultimate timing of the resolution and/or closure of audits is highly uncertain, the Company believes it is reasonably possible that $0.2 million of gross unrecognized tax benefits will change in the next 12 months as a result of audit closures and statute requirements. The Company files U.S. federal, U.S. state and foreign tax returns. For U.S. federal purposes, the Company is generally no longer subject to tax examinations for fiscal years prior to 2014. For U.S. state tax returns, the Company is generally no longer subject to tax examinations for fiscal years prior to 2013. For foreign purposes, the Company is generally no longer subject to tax examinations for tax periods 2006 and prior. Certain carryforward tax attributes generated in prior years remain subject to examination, adjustment and recapture. On January 20, 2017, the Company settled an ongoing audit by the Italian Revenue Agency for the fiscal year ended June 30, 2013, resulting in immaterial impact on tax expense. The Company assesses all available positive and negative evidence to estimate if sufficient future taxable income will be generated to utilize the existing deferred tax assets by jurisdiction. During the third quarter of fiscal 2017, the Company concluded that it was necessary to recognize a full valuation allowance against its U.S. deferred tax assets and other deferred charges primarily due to the Company’s three-year cumulative pre-tax loss position in the U.S. and the termination of the Wolfspeed sale transaction, which was anticipated to generate U.S. taxable income upon the closing of the sale. Based on this evaluation, during the three months ended March 26, 2017, the Company recorded a valuation allowance of $67.6 million against its U.S. deferred tax assets. In addition, the company recognized a related deferred tax charge of $17.9 million. During the fourth quarter of fiscal 2016, the Company concluded it is likely that sufficient future taxable income needed to fully utilize net operating loss carryovers in Luxembourg will not be generated due to additional losses on the Company’s equity investment held there. As a result, the Company recorded a $9.5 million valuation allowance against the related deferred tax asset, representing the $32.4 million net operating loss carryover net of tax. During the nine months ended March 26, 2017, the Company recorded an additional $0.9 million valuation allowance against the loss carryover deferred tax asset as a result of the $3.2 million year-to-date loss in Luxembourg.

Income Taxes

The variation between the Company's effective income tax rate and the U.S. statutory rate of 35% is primarily due to: (i) changes in the Company’s valuation allowances against deferred tax assets in the U.S. and Luxembourg, (ii) projected income for the full year derived from international locations with lower tax rates than the U.S. and (iii) projected tax credits generated.

U.S. GAAP requires a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is cumulatively more than 50% likely to be realized upon ultimate settlement.

As of June 26, 2016, the Company's liability for unrecognized tax benefits was $17.7 million. During the nine months ended March 26, 2017, the Company released $4.3 million of its unrecognized tax benefits; $3.7 million following statute expirations, and $0.6 million related to settlement of the audit by the Italian Revenue Agency. As a result, the total liability for unrecognized tax benefits as of March 26, 2017 was $13.4 million. If any portion of this $13.4 million is recognized, the Company will then include that portion in the computation of its effective tax rate. Although the ultimate timing of the resolution and/or closure of audits is highly uncertain, the Company believes it is reasonably possible that $0.2 million of gross unrecognized tax benefits will change in the next 12 months as a result of audit closures and statute requirements.

The Company files U.S. federal, U.S. state and foreign tax returns. For U.S. federal purposes, the Company is generally no longer subject to tax examinations for fiscal years prior to 2014. For U.S. state tax returns, the Company is generally no longer subject to tax examinations for fiscal years prior to 2013. For foreign purposes, the Company is generally no longer subject to tax examinations for tax periods 2006 and prior. Certain carryforward tax attributes generated in prior years remain subject to examination, adjustment and recapture. On January 20, 2017, the Company settled an ongoing audit by the Italian Revenue Agency for the fiscal year ended June 30, 2013, resulting in immaterial impact on tax expense.

The Company assesses all available positive and negative evidence to estimate if sufficient future taxable income will be generated to utilize the existing deferred tax assets by jurisdiction. During the third quarter of fiscal 2017, the Company concluded that it was necessary to recognize a full valuation allowance against its U.S. deferred tax assets and other deferred charges primarily due to the Company’s three-year cumulative pre-tax loss position in the U.S. and the termination of the Wolfspeed sale transaction, which was anticipated to generate U.S. taxable income upon the closing of the sale. Based on this evaluation, during the three months ended March 26, 2017, the Company recorded a valuation allowance of $67.6 million against its U.S. deferred tax assets. In addition, the company recognized a related deferred tax charge of $17.9 million.

During the fourth quarter of fiscal 2016, the Company concluded it is likely that sufficient future taxable income needed to fully utilize net operating loss carryovers in Luxembourg will not be generated due to additional losses on the Company’s equity investment held there. As a result, the Company recorded a $9.5 million valuation allowance against the related deferred tax asset, representing the $32.4 million net operating loss carryover net of tax. During the nine months ended March 26, 2017, the Company recorded an additional $0.9 million valuation allowance against the loss carryover deferred tax asset as a result of the $3.2 million year-to-date loss in Luxembourg.