Financial instruments - Summary of Derivative Instruments (Details) - USD ($) $ in Millions	Nov. 30, 2024	Aug. 31, 2024
Other current assets | Foreign currency forwards | Derivatives designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, assets	$ 509	$ 7
Fair value, assets	9	0
Other current assets | Foreign currency forwards | Derivatives not designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, assets	2,686	534
Fair value, assets	10	3
Other current assets | Cross currency interest rate swaps | Derivatives designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, assets	50	50
Fair value, assets	3	1
Other current assets | Total return swaps | Derivatives not designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, assets	191	211
Fair value, assets	3	11
Other non-current assets | Foreign currency forwards | Derivatives designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, assets		4
Notional amount, liabilities	2
Fair value, assets		0
Fair value, liabilities	0
Other non-current assets | Cross currency interest rate swaps | Derivatives designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, assets	250	253
Fair value, assets	10	5
Accrued Liabilities | Foreign currency forwards | Derivatives designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, liabilities	730	923
Fair value, liabilities	1	15
Accrued Liabilities | Foreign currency forwards | Derivatives not designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, liabilities	1,396	3,606
Fair value, liabilities	2	52
Accrued Liabilities | Cross currency interest rate swaps | Derivatives designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, liabilities		356
Fair value, liabilities		5
Accrued Liabilities | Total return swaps | Derivatives not designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, liabilities	26
Fair value, liabilities	0
Accrued Liabilities | Variable prepaid forward contracts | Derivatives not designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, liabilities	2,190	1,185
Fair value, liabilities	2,479	1,332
Other non-current liabilities | Foreign currency forwards | Derivatives designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, liabilities	4	2
Fair value, liabilities	0	0
Other non-current liabilities | Variable prepaid forward contracts | Derivatives not designated as hedges:
Derivatives, Fair Value [Line Items]
Notional amount, liabilities	1,536	2,541
Fair value, liabilities	$ 1,640	$ 2,587