Income Taxes	6 Months Ended
Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes On December 22, 2017, the U.S. government enacted comprehensive tax legislation, commonly known as the Tax Cuts and Jobs Act of 2017, or the Act, which significantly reformed the Internal Revenue Code of 1986, as amended. The Act contains broad and complex changes to corporate taxation, including, in part, reduction of the U.S. federal corporate tax rate from 35% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously considered permanently reinvested, and creates new taxes on certain foreign-sourced earnings. As our accounting and tax year is the fiscal period ending on the last Saturday in June, U.S. federal tax law requires that taxpayers with a fiscal year that spans the effective date of a tax rate change to calculate a blended tax rate based on the pro rata number of days in the fiscal year before and after the effective date. As a result, our U.S. federal tax rate for fiscal 2018 was a days-weighted blended tax rate of 28.17%. For fiscal 2019 and subsequent tax years, our U.S. federal tax rate is 21%. In fiscal 2018, we recognized provisional tax expense of $41.4 million, related to the tax impact of the Act, of which an expense of $44.1 million relates to the one-time transition tax and a benefit of $2.7 million relates to remeasurement of deferred tax at the new tax rate. The one-time transition tax is based on our post-1986 foreign earnings and profits, or E&P, which we previously excluded from U.S. income taxes as we considered such earnings to be indefinitely reinvested overseas. The one-time transition tax is applied at a 15.5% tax rate on cash assets and an 8% tax rate for other specified assets. We were able to utilize the research credit carryforward, resulting in a net one-time transition tax impact of $11.9 million on the income tax payable. As of December 31, 2018, based on additional analysis of technical guidance, we recognized a non-discrete tax expense of $1.4 million, which is included in the annual effective tax rate, and a discrete benefit of $0.2 million, both of which relate to the limitation on the deduction of executive’s compensation. Staff Accounting Bulletin 118 allowed companies to record provisional amounts and recognize the effect of the tax law during a measurement period. The measurement period ended in the second quarter of our fiscal 2019. As of December 31, 2018, we have finalized our accounting for the tax impact of the Act. However, further technical guidance related to the Act, including final regulations on a broad range of topics, is expected to be issued and, as such, if our interpretation and final accounting are inconsistent with future regulations and guidance we will recognize the impact as a discrete item in the period that such guidance is issued. The Global Intangible Low-Tax Income, or GILTI, which is a provision under the Act, imposes a tax on foreign income in excess of a deemed return on tangible assets of foreign corporations. GILTI requires an accounting policy election of either (1) treating taxes due on future U.S. inclusions in taxable income related to GILTI as a current period expense when incurred or (2) factoring such amounts into the measurement of deferred taxes. We elected to treat GILTI as a period cost and recognize the impact in the period when it is incurred. We account for income taxes under the asset and liability method. The provision for income taxes recorded in interim periods is recorded by applying the estimated annual effective tax rate to year-to-date income before provision for income taxes, excluding the effects of significant unusual or infrequently occurring discrete items. The tax effects of discrete items are recorded in the same period that the related discrete items are reported and results in a difference between the actual effective tax rate and the estimated annual effective tax rate. The provision for income taxes of $7.5 million and $53.3 million for the three months ended December 31, 2018 and 2017, respectively, represented estimated federal, foreign, and state income taxes. The effective tax rate for the three months ended December 31, 2018 diverged from the combined U.S. federal and state statutory tax rate primarily because of foreign withholding taxes, nondeductible amortization, the impact of net shortfalls in share-based compensation deductions and GILTI, partially offset by the benefit of research credits, foreign tax credits, foreign-derived intangible income deduction, release of reserves related to uncertain tax positions and foreign income taxed at lower tax rates. The effective tax rate for the three months ended December 31, 2017, diverged from the combined U.S. federal and state statutory tax rate, primarily because of the impact of the one-time transition tax on E&P, the impact of the reduction in the U.S. federal tax rate on our net deferred tax assets, foreign withholding taxes, nondeductible amortization, the impact of accounting for qualified stock options, and foreign income taxed at higher tax rates, partially offset by benefits from research credits. The provision for income taxes of $7.2 million and $56.5 million for the six months ended December 31, 2018, and 2017, respectively, represented estimated federal, foreign, and state income taxes. The effective tax rate for the six months ended December 31, 2018, diverged from the combined U.S. federal and state statutory tax rate primarily due to foreign withholding taxes, nondeductible amortization, the impact of net shortfalls in share-based compensation deductions, and GILTI, partially offset by the benefit of research credits, foreign tax credits, foreign-derived intangible income deduction, excess share-based compensation deductions, release of reserves related to uncertain tax positions and foreign income taxed at lower tax rates. The effective tax rate for the six months ended December 31, 2017, diverged from the combined U.S. federal and state statutory tax rate, primarily because of the impact of the one-time transition tax on E&P, the impact of the reduction in the U.S. federal tax rate on our net deferred tax assets, foreign withholding taxes, nondeductible amortization, the impact of accounting for qualified stock options, and foreign income taxed at higher tax rates, partially offset by benefits from research credits. The total liability for gross unrecognized tax benefits related to uncertain tax positions decreased $0.1 million during the six months ended December 31, 2018, to $24.7 million from $24.8 million at June 30, 2018, and was included in other long-term liabilities on our condensed consolidated balance sheets. If recognized, the total gross unrecognized tax benefits would reduce the effective tax rate on income from continuing operations. Accrued interest and penalties related to unrecognized tax benefits as of December 31, 2018 were $2.3 million; this balance increased by $0.4 million compared to June 30, 2018. We classify interest and penalties as components of income tax expense. It is reasonably possible that the amount of the liability for unrecognized tax benefits may change within the next twelve months and an estimate of the range of possible changes include an increase in our liability of up to $4.4 million. In July 2018, the U.S. Ninth Circuit Court of Appeals reversed the 2015 decision of the U.S. Tax Court in Altera Corp. v. Commissioner which found that the Treasury regulations addressing the treatment of stock-based compensation in a cost-sharing arrangement with a related party were invalid. In August 2018, the U.S. Ninth Circuit Court of Appeals withdrew its July 2018 opinion. The reconstituted panel has not issued an opinion on this appeal. As our tax filing position is consistent with the Treasury regulations, we determined no adjustment to our financial statements is required, however, due to the uncertainties with respect to the ultimate resolution, we will continue to monitor developments in this case. Our major tax jurisdictions are the United States, Hong Kong SAR, and Japan. From fiscal 2013 onward, we remain subject to examination by one or more of these jurisdictions. In August 2018, we received the revenue agent’s report resolving the fiscal 2014 and 2015 examination with the Internal Revenue Service with no material impact on our consolidated financial statements. Our case is pending review by the Joint Committee on Taxation, which we anticipate will conclude in June 2019. Any prospective adjustments to our unrecognized tax benefits will be recorded as an increase or decrease to income tax expense and cause a corresponding change to our effective tax rate. Accordingly, our effective tax rate could fluctuate materially from period to period.

Income Taxes

6 Months Ended

Dec. 31, 2018

11. Income Taxes

On December 22, 2017, the U.S. government enacted comprehensive tax legislation, commonly known as the Tax Cuts and Jobs Act of 2017, or the Act, which significantly reformed the Internal Revenue Code of 1986, as amended. The Act contains broad and complex changes to corporate taxation, including, in part, reduction of the U.S. federal corporate tax rate from 35% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously considered permanently reinvested, and creates new taxes on certain foreign-sourced earnings. As our accounting and tax year is the fiscal period ending on the last Saturday in June, U.S. federal tax law requires that taxpayers with a fiscal year that spans the effective date of a tax rate change to calculate a blended tax rate based on the pro rata number of days in the fiscal year before and after the effective date. As a result, our U.S. federal tax rate for fiscal 2018 was a days-weighted blended tax rate of 28.17%. For fiscal 2019 and subsequent tax years, our U.S. federal tax rate is 21%.

In fiscal 2018, we recognized provisional tax expense of $41.4 million, related to the tax impact of the Act, of which an expense of $44.1 million relates to the one-time transition tax and a benefit of $2.7 million relates to remeasurement of deferred tax at the new tax rate. The one-time transition tax is based on our post-1986 foreign earnings and profits, or E&P, which we previously excluded from U.S. income taxes as we considered such earnings to be indefinitely reinvested overseas. The one-time transition tax is applied at a 15.5% tax rate on cash assets and an 8% tax rate for other specified assets. We were able to utilize the research credit carryforward, resulting in a net one-time transition tax impact of $11.9 million on the income tax payable. As of December 31, 2018, based on additional analysis of technical guidance, we recognized a non-discrete tax expense of $1.4 million, which is included in the annual effective tax rate, and a discrete benefit of $0.2 million, both of which relate to the limitation on the deduction of executive’s compensation.

Staff Accounting Bulletin 118 allowed companies to record provisional amounts and recognize the effect of the tax law during a measurement period. The measurement period ended in the second quarter of our fiscal 2019. As of December 31, 2018, we have finalized our accounting for the tax impact of the Act. However, further technical guidance related to the Act, including final regulations on a broad range of topics, is expected to be issued and, as such, if our interpretation and final accounting are inconsistent with future regulations and guidance we will recognize the impact as a discrete item in the period that such guidance is issued.

The Global Intangible Low-Tax Income, or GILTI, which is a provision under the Act, imposes a tax on foreign income in excess of a deemed return on tangible assets of foreign corporations. GILTI requires an accounting policy election of either (1) treating taxes due on future U.S. inclusions in taxable income related to GILTI as a current period expense when incurred or (2) factoring such amounts into the measurement of deferred taxes. We elected to treat GILTI as a period cost and recognize the impact in the period when it is incurred.

We account for income taxes under the asset and liability method. The provision for income taxes recorded in interim periods is recorded by applying the estimated annual effective tax rate to year-to-date income before provision for income taxes, excluding the effects of significant unusual or infrequently occurring discrete items. The tax effects of discrete items are recorded in the same period that the related discrete items are reported and results in a difference between the actual effective tax rate and the estimated annual effective tax rate.

The provision for income taxes of $7.5 million and $53.3 million for the three months ended December 31, 2018 and 2017, respectively, represented estimated federal, foreign, and state income taxes. The effective tax rate for the three months ended December 31, 2018 diverged from the combined U.S. federal and state statutory tax rate primarily because of foreign withholding taxes, nondeductible amortization, the impact of net shortfalls in share-based compensation deductions and GILTI, partially offset by the benefit of research credits, foreign tax credits, foreign-derived intangible income deduction, release of reserves related to uncertain tax positions and foreign income taxed at lower tax rates. The effective tax rate for the three months ended December 31, 2017, diverged from the combined U.S. federal and state statutory tax rate, primarily because of the impact of the one-time transition tax on E&P, the impact of the reduction in the U.S. federal tax rate on our net deferred tax assets, foreign withholding taxes, nondeductible amortization, the impact of accounting for qualified stock options, and foreign income taxed at higher tax rates, partially offset by benefits from research credits.

The provision for income taxes of $7.2 million and $56.5 million for the six months ended December 31, 2018, and 2017, respectively, represented estimated federal, foreign, and state income taxes. The effective tax rate for the six months ended December 31, 2018, diverged from the combined U.S. federal and state statutory tax rate primarily due to foreign withholding taxes, nondeductible amortization, the impact of net shortfalls in share-based compensation deductions, and GILTI, partially offset by the benefit of research credits, foreign tax credits, foreign-derived intangible income deduction, excess share-based compensation deductions, release of reserves related to uncertain tax positions and foreign income taxed at lower tax rates. The effective tax rate for the six months ended December 31, 2017, diverged from the combined U.S. federal and state statutory tax rate, primarily because of the impact of the one-time transition tax on E&P, the impact of the reduction in the U.S. federal tax rate on our net deferred tax assets, foreign withholding taxes, nondeductible amortization, the impact of accounting for qualified stock options, and foreign income taxed at higher tax rates, partially offset by benefits from research credits.

The total liability for gross unrecognized tax benefits related to uncertain tax positions decreased $0.1 million during the six months ended December 31, 2018, to $24.7 million from $24.8 million at June 30, 2018, and was included in other long-term liabilities on our condensed consolidated balance sheets. If recognized, the total gross unrecognized tax benefits would reduce the effective tax rate on income from continuing operations. Accrued interest and penalties related to unrecognized tax benefits as of December 31, 2018 were $2.3 million; this balance increased by $0.4 million compared to June 30, 2018. We classify interest and penalties as components of income tax expense. It is reasonably possible that the amount of the liability for unrecognized tax benefits may change within the next twelve months and an estimate of the range of possible changes include an increase in our liability of up to $4.4 million.

In July 2018, the U.S. Ninth Circuit Court of Appeals reversed the 2015 decision of the U.S. Tax Court in Altera Corp. v. Commissioner which found that the Treasury regulations addressing the treatment of stock-based compensation in a cost-sharing arrangement with a related party were invalid. In August 2018, the U.S. Ninth Circuit Court of Appeals withdrew its July 2018 opinion. The reconstituted panel has not issued an opinion on this appeal. As our tax filing position is consistent with the Treasury regulations, we determined no adjustment to our financial statements is required, however, due to the uncertainties with respect to the ultimate resolution, we will continue to monitor developments in this case.

Our major tax jurisdictions are the United States, Hong Kong SAR, and Japan. From fiscal 2013 onward, we remain subject to examination by one or more of these jurisdictions. In August 2018, we received the revenue agent’s report resolving the fiscal 2014 and 2015 examination with the Internal Revenue Service with no material impact on our consolidated financial statements. Our case is pending review by the Joint Committee on Taxation, which we anticipate will conclude in June 2019. Any prospective adjustments to our unrecognized tax benefits will be recorded as an increase or decrease to income tax expense and cause a corresponding change to our effective tax rate. Accordingly, our effective tax rate could fluctuate materially from period to period.