Deferred Compensation and Retirement Plans - Components of Net Periodic Benefits Costs (Parenthetical) (Detail) |
3 Months Ended | |
|---|---|---|
Jul. 31, 2022 |
Jul. 31, 2021 |
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| Compensation And Retirement Disclosure [Abstract] | ||
| Expected long-term rate of return on plan assets | 5.50% | 6.00% |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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