Financial instruments (Details) - USD ($) shares in Millions, $ in Millions			3 Months Ended		9 Months Ended
	Jun. 15, 2023	May 11, 2023	May 31, 2023	May 31, 2022	May 31, 2023	May 31, 2022	Aug. 31, 2022
Derivatives, Fair Value [Line Items]
Proceeds from variable prepaid forward		$ 644			$ 644	$ 0
Pledged collateral (in shares)		4.6
Foreign currency forwards | Not Designated as Hedging Instrument | Other income, net
Derivatives, Fair Value [Line Items]
Gains and (losses) due to changes in fair value of derivative instruments			$ (112)	$ 319	(203)	322
Total return swap | Not Designated as Hedging Instrument | Selling, general and administrative expense
Derivatives, Fair Value [Line Items]
Gains and (losses) due to changes in fair value of derivative instruments			2	(14)	2	(24)
Variable prepaid forward | Not Designated as Hedging Instrument | Other income, net
Derivatives, Fair Value [Line Items]
Gains and (losses) due to changes in fair value of derivative instruments			(26)	$ 0	(26)	$ 0
Other current assets | Foreign currency forwards | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount, assets			493		493		$ 448
Fair value, assets			3		3		19
Other current assets | Foreign currency forwards | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount, assets			1,909		1,909		2,874
Fair value, assets			13		13		49
Other current assets | Cross currency interest rate swaps | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount, assets			100		100		150
Fair value, assets			0		0		12
Other current assets | Total return swap | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount, assets			133		133
Fair value, assets			1		1
Other non-current assets | Foreign currency forwards | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount, assets							3
Fair value, assets							0
Other non-current assets | Cross currency interest rate swaps | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount, assets			650		650		750
Fair value, assets			44		44		83
Other current liabilities | Foreign currency forwards | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount, liabilities			418		418		221
Fair value, liabilities			4		4		1
Other current liabilities | Foreign currency forwards | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount, liabilities			2,483		2,483		1,098
Fair value, liabilities			15		15		6
Other current liabilities | Total return swap | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount, liabilities			53		53		183
Fair value, liabilities			1		1		$ 6
Other non-current liabilities | Foreign currency forwards | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount, liabilities			8		8
Fair value, liabilities			0		0
Other non-current liabilities | Variable prepaid forward | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount, liabilities			787		787
Fair value, liabilities			$ 670		$ 670
Subsequent Event
Derivatives, Fair Value [Line Items]
Proceeds from variable prepaid forward	$ 325
Pledged collateral (in shares)	2.2