Income Taxes	9 Months Ended
Jan. 27, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective income tax rate for the three months ended January 27, 2018 was (170.0)% compared to 23.2% for the three months ended January 28, 2017, and for the nine months ended January 27, 2018 was (20.9)% compared to 31.9% for the nine months ended January 28, 2017. The tax benefit for the three and nine months ended January 27, 2018 was primarily due to the impact of the Tax Cuts and Jobs Act ("Tax Act"), enacted on December 22, 2017 by the U.S. government. The Tax Act significantly revises the future ongoing U.S. federal corporate income tax by, among other things, lowering U.S. federal corporate tax rates and implementing a territorial tax system. Effective January 1, 2018, the Tax Act reduced the U.S. federal corporate tax rate from 35.0% to 21.0%. For our fiscal year ending April 28, 2018, we will utilize a blended rate of approximately 30.5%. For the quarter ended January 27, 2018, these impacts resulted in a provisional discrete net tax benefit of $77,256, which included provisional amounts of $81,206 of tax benefit on U.S. deferred tax assets and liabilities and $3,950 of tax expense for a one-time transition tax on unremitted foreign earnings. The legislative changes included in the Tax Act are broad and complex. We determined that the transition tax on unremitted foreign earnings is provisional because various components of the computation are unknown as of January 27, 2018. In addition, we determined that the impact of the U.S. federal corporate income tax rate change on the U.S. deferred tax assets and liabilities is provisional because the amount cannot be calculated until the underlying timing differences are known rather than estimated. Given the Tax Act’s significant changes and potential opportunities to repatriate cash tax free, we are in the process of evaluating our current indefinite assertions with regard to cash and earnings that have been subjected to the transition tax. We continue to apply ASC 740 based on the provisions of the tax law that were in effect immediately prior to the enactment of the Tax Act. With regard to unremitted earnings of foreign subsidiaries that have not been previously taxed, we do not currently provide for U.S. taxes since we intend to invest such undistributed earnings indefinitely outside of the U.S. We continue to review the anticipated impacts of the global intangible low taxed income (“GILTI”) and base erosion and anti-abuse tax (“BEAT”) provisions which are not effective until fiscal year 2019. We have not recorded any impact associated with either GILTI or BEAT in the tax rate for the three months ended January 27, 2018. The final transition impacts of the Tax Act may differ from the above estimate, possibly materially, due to, among other things, changes in interpretations of the Tax Act, any federal and/or state legislative action to address questions that arise because of the Tax Act, any changes in accounting standards for income taxes or related interpretations in response to the Tax Act, or any updates or changes to estimates we have utilized to calculate the transition impacts, including impacts from changes to current year earnings estimates and foreign exchange rates of foreign subsidiaries. The Securities and Exchange Commission has issued rules that will allow for a measurement period of up to one year after the enactment date of the Tax Act to finalize the recording of the related tax impacts.

Income Taxes

The effective income tax rate for the three months ended January 27, 2018 was (170.0)% compared to 23.2% for the three months ended January 28, 2017, and for the nine months ended January 27, 2018 was (20.9)% compared to 31.9% for the nine months ended January 28, 2017.

The tax benefit for the three and nine months ended January 27, 2018 was primarily due to the impact of the Tax Cuts and Jobs Act ("Tax Act"), enacted on December 22, 2017 by the U.S. government. The Tax Act significantly revises the future ongoing U.S. federal corporate income tax by, among other things, lowering U.S. federal corporate tax rates and implementing a territorial tax system. Effective January 1, 2018, the Tax Act reduced the U.S. federal corporate tax rate from 35.0% to 21.0%. For our fiscal year ending April 28, 2018, we will utilize a blended rate of approximately 30.5%. For the quarter ended January 27, 2018, these impacts resulted in a provisional discrete net tax benefit of $77,256, which included provisional amounts of $81,206 of tax benefit on U.S. deferred tax assets and liabilities and $3,950 of tax expense for a one-time transition tax on unremitted foreign earnings.

The legislative changes included in the Tax Act are broad and complex. We determined that the transition tax on unremitted foreign earnings is provisional because various components of the computation are unknown as of January 27, 2018. In addition, we determined that the impact of the U.S. federal corporate income tax rate change on the U.S. deferred tax assets and liabilities is provisional because the amount cannot be calculated until the underlying timing differences are known rather than estimated.

Given the Tax Act’s significant changes and potential opportunities to repatriate cash tax free, we are in the process of evaluating our current indefinite assertions with regard to cash and earnings that have been subjected to the transition tax. We continue to apply ASC 740 based on the provisions of the tax law that were in effect immediately prior to the enactment of the Tax Act. With regard to unremitted earnings of foreign subsidiaries that have not been previously taxed, we do not currently provide for U.S. taxes since we intend to invest such undistributed earnings indefinitely outside of the U.S.

We continue to review the anticipated impacts of the global intangible low taxed income (“GILTI”) and base erosion and anti-abuse tax (“BEAT”) provisions which are not effective until fiscal year 2019. We have not recorded any impact associated with either GILTI or BEAT in the tax rate for the three months ended January 27, 2018.

The final transition impacts of the Tax Act may differ from the above estimate, possibly materially, due to, among other things, changes in interpretations of the Tax Act, any federal and/or state legislative action to address questions that arise because of the Tax Act, any changes in accounting standards for income taxes or related interpretations in response to the Tax Act, or any updates or changes to estimates we have utilized to calculate the transition impacts, including impacts from changes to current year earnings estimates and foreign exchange rates of foreign subsidiaries. The Securities and Exchange Commission has issued rules that will allow for a measurement period of up to one year after the enactment date of the Tax Act to finalize the recording of the related tax impacts.