Equity method investments - Summarized Financial Information of Equity Method Investments (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021
Income Statement [Abstract]
Sales	$ 33,756	$ 32,779	$ 67,656	$ 64,217
Gross profit	7,708	6,781	15,283	13,411
Net earnings (loss)	806	1,025	4,337	726
Share of earnings (loss) from equity method investments	133	94	226	(1,264)
Equity Method Investment
Income Statement [Abstract]
Sales	67,955	59,425	135,543	115,527
Gross profit	3,389	2,672	6,809	5,089
Net earnings (loss)	$ 564	$ 486	$ 872	$ (4,329)

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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