Deferred Compensation And Retirement Plans (Weighted-Average Assumptions Used In Calculating The Benefit Obligations) (Detail) |
12 Months Ended | ||
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Apr. 30, 2017 |
Apr. 30, 2016 |
Apr. 30, 2015 |
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| Pension Plans, Defined Benefit | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Discount rate, beginning of period | 3.18% | 3.28% | 3.60% |
| Discount rate, end of year | 3.57% | 3.18% | 3.28% |
| Rate of compensation increase | 0.00% | 0.00% | 0.00% |
| Expected long-term rates of return on plan assets | 6.50% | 6.50% | |
| Medical and Life Insurance | Hay Group | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Discount rate, beginning of period | 3.36% | 4.10% | |
| Discount rate, end of year | 3.75% | 3.36% | 4.10% |
| Healthcare care cost trend rate | 7.00% | 7.00% | |
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- Definition The interest rate used to adjust for the time value of money for the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Expected rate of compensation increases (for pay-related plans). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. No definition available.
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- Definition The ultimate trend rate for health care costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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