Pension and Other Postretirement Benefits (Plans with PBO in Excess of Plan Assets) (Details) - USD ($) $ in Millions |
Apr. 30, 2026 |
Apr. 30, 2025 |
Apr. 30, 2024 |
|---|---|---|---|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Total, Plan Assets | $ 514 | $ 576 | |
| Pension Plan [Member] | |||
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation | (148) | (138) | |
| Defined Benefit Plan, Pension Plan with Plan Assets in Excess of Projected Benefit Obligation, Projected Benefit Obligation | (467) | (545) | |
| Defined Benefit Plan, Benefit Obligation | (615) | (683) | $ (679) |
| Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets | 0 | 0 | |
| Defined Benefit Plan, Pension Plan with Plan Assets in Excess of Projected Benefit Obligation, Plan Assets | 514 | 576 | |
| Total, Plan Assets | $ 514 | $ 576 | $ 576 |
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- Definition Defined Benefit Plan, Pension Plan with Plan Assets in Excess of Projected Benefit Obligation, Plan Assets No definition available.
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- Definition Defined Benefit Plan, Pension Plan with Plan Assets in Excess of Projected Benefit Obligation, Projected Benefit Obligation No definition available.
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- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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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- Details
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