Retirement benefits - accumulated benefit obligations in excess of plan assets (Details) - Pension Plan - USD ($) $ in Millions |
Aug. 31, 2024 |
Aug. 31, 2023 |
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Projected benefit obligation | $ 5,433 | $ 5,515 |
| Accumulated benefit obligation | 5,423 | 5,503 |
| Fair value of plan assets | $ 5,994 | $ 5,594 |
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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 Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of plan asset for defined benefit plan with accumulated 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 accumulated benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Details
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