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Income Taxes - Summary of Tax Years Remain Subject to Examinations under Major Tax Jurisdictions (Detail) | 12 Months Ended
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Apr. 30, 2021
Earliest Tax Year | United States - State and Local Income Tax |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2012
Latest Tax Year | United States - State and Local Income Tax |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2021
Federal Income Tax | Earliest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2016
Federal Income Tax | Latest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2021
Australia | Earliest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2014
Australia | Latest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2021
Germany | Earliest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2015
Germany | Latest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2021
India | Earliest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2007
India | Latest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2021
Japan | Earliest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2014
Japan | Latest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2021
The Netherlands | Earliest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2017
The Netherlands | Latest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2021
United Kingdom | Earliest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2016
United Kingdom | Latest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2021
Canada | Earliest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2016
Canada | Latest Tax Year |
Income Tax Examination [Line Items] |
Tax year subject to examination | 2021

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- Definition Tax year that remains open to examination under enacted tax laws, in CCYY format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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