New Accounting Standards Significant Accounting Policies (Policies)	3 Months Ended
Jul. 31, 2019
Accounting Policies [Abstract]
New Accounting Standards	In February 2016, the FASB issued ASU 2016-2, “Leases.” This guidance establishes a ROU model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. The Company adopted this standard effective May 1, 2019. See Note G for a discussion of the impact of adoption of this standard. In August 2018, the Commission adopted final rules pursuant to Commission Release No. 33-10532, “Disclosure Update and Simplification,” amending certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. In addition, the amendments expanded the disclosure requirements relating to the analysis of stockholders’ equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders’ equity presented in the balance sheet must be provided in a note or separate statement. The analysis should present a reconciliation of the beginning balance to the ending balance of each period for which a statement of income is required to be filed. This final rule became effective on November 5, 2018. The Company adopted this final rule effective for the second quarter of fiscal 2019. The adoption of this standard did not have a significant impact on the Company’s consolidated financial position or results of operations. In February 2018, the FASB issued ASU 2018-2, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” This guidance provides the Company with an option to reclassify stranded tax effects resulting from the Tax Cuts and Jobs Act (the "2017 Tax Act") from accumulated other comprehensive income to retained earnings. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. The Company adopted this standard effective May 1, 2019 and did not elect to reclassify tax effects as a result of tax reform; therefore, the adoption did not have a significant impact on the Company’s consolidated financial position or results of operations. In June 2016, the FASB issued ASU 2016-13, “Measurement of Credit Losses on Financial Instruments,” which replaces the current incurred loss method used for determining credit losses on financial assets, including trade receivables, with an expected credit loss method. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019. The Company will adopt this standard in fiscal year 2021. The Company does not expect the adoption of this standard to have a significant impact on the Company’s consolidated financial position or results of operations.

In February 2016, the FASB issued ASU 2016-2, “Leases.” This guidance establishes a ROU model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. The Company adopted this standard effective May 1, 2019. See Note G for a discussion of the impact of adoption of this standard.

In August 2018, the Commission adopted final rules pursuant to Commission Release No. 33-10532, “Disclosure Update and Simplification,” amending certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. In addition, the amendments expanded the disclosure requirements relating to the analysis of stockholders’ equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders’ equity presented in the balance sheet must be provided in a note or separate statement. The analysis should present a reconciliation of the beginning balance to the ending balance of each period for which a statement of income is required to be filed. This final rule became effective on November 5, 2018. The Company adopted this final rule effective for the second quarter of fiscal 2019. The adoption of this standard did not have a significant impact on the Company’s consolidated financial position or results of operations.

In February 2018, the FASB issued ASU 2018-2, “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” This guidance provides the Company with an option to reclassify stranded tax effects resulting from the Tax Cuts and Jobs Act (the "2017 Tax Act") from accumulated other comprehensive income to retained earnings. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018, with early adoption permitted. The Company adopted this standard effective May 1, 2019 and did not elect to reclassify tax effects as a result of tax reform; therefore, the adoption did not have a significant impact on the Company’s consolidated financial position or results of operations.

In June 2016, the FASB issued ASU 2016-13, “Measurement of Credit Losses on Financial Instruments,” which replaces the current incurred loss method used for determining credit losses on financial assets, including trade receivables, with an expected credit loss method. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019. The Company will adopt this standard in fiscal year 2021. The Company does not expect the adoption of this standard to have a significant impact on the Company’s consolidated financial position or results of operations.