Retirement Benefits Plans - Schedule of Weighted-Average Assumptions (Details) |
12 Months Ended | ||
|---|---|---|---|
Apr. 30, 2026 |
Apr. 30, 2025 |
Apr. 30, 2024 |
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| Retirement Benefits [Abstract] | |||
| Discount rate | 6.20% | 5.60% | 5.20% |
| Inflation assumption | |||
| RPI | 3.20% | 2.90% | 3.20% |
| CPI | 2.70% | 2.30% | 2.70% |
| Rate of pension increase in payment | 3.00% | 2.80% | 3.00% |
| Expected return on plan assets | 6.20% | 5.60% | 5.20% |
| X | ||||||||||
- Definition Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Consumer Price Index Rate No definition available.
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| X | ||||||||||
- Definition Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Retail Price Index Rate No definition available.
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| X | ||||||||||
- Definition Defined Benefit Plan, Inflation Assumption No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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| X | ||||||||||
- Definition Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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