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Pension and Other Postretirement Plans - Additional Information (Detail) - Pension Plans - USD ($) $ in Thousands | Jul. 31, 2021 | Apr. 30, 2021
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Defined Benefit Plan Disclosure [Line Items] |  |
Expected future employer contributions, current fiscal year | $ 98,000 |
Expected future employer contributions, additional cash contribution | $ 50,000 | $ 50,000

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- Definition Defined Benefit Plan, Expected Future Employer Contributions, Additional Cash Contribution + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of contributions received and expected to be received by defined benefit plan from employer in current fiscal year. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4587-114921 + Details
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- Details
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