Summary of major accounting policies - variable interest entities (Details) - USD ($) $ in Millions	Aug. 31, 2024	Aug. 31, 2023
Variable Interest Entity [Line Items]
Assets	$ 81,037	$ 96,628
Liabilities	68,858	68,140
Variable interest entity, primary beneficiary
Variable Interest Entity [Line Items]
Assets	928	881
Liabilities	$ 540	$ 486

Amount of asset recognized for present right to economic benefit.

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+ Details

- Definition

Amount of liability recognized for present obligation requiring transfer or otherwise providing economic benefit to others.

+ References

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+ Details

- 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.

+ References + Details