Retirement Benefit Plans (Details) - Benefit Plans - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
Apr. 30, 2026 |
Apr. 30, 2025 |
Apr. 30, 2026 |
Apr. 30, 2025 |
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| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||||||||
| Service cost | $ 15 | $ 12 | $ 30 | $ 24 | |||||
| Interest cost | [1] | 95 | 89 | 188 | 178 | ||||
| Expected return on plan assets | (159) | [1] | (146) | (315) | [1] | (295) | [1] | ||
| Amortization and Deferrals: | |||||||||
| Actuarial loss | [1] | 24 | 31 | 48 | 62 | ||||
| Prior service cost (benefit) | [1] | 2 | (1) | 2 | (2) | ||||
| Net periodic benefit credit | (23) | (15) | (47) | (33) | |||||
| Settlement loss and special termination benefits | [1] | 2 | 3 | 2 | 3 | ||||
| Total net benefit credit | $ (21) | $ (12) | $ (45) | $ (30) | |||||
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- Definition Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement and Special Termination Benefits No definition available.
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- Definition The total amount of net periodic benefit cost (credit) for defined benefit plans for the period, before gain or loss due to settlements or curtailments. No definition available.
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. 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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