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Exit and disposal activities - Restructuring Reserve Activity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	May 31, 2025	May 31, 2024	May 31, 2025	May 31, 2024
Restructuring Reserve [Roll Forward]
Costs	$ 73	$ 0	$ 473	$ 0
Footprint Optimization Program
Restructuring Reserve [Roll Forward]
Costs	73		473
Employee severance and other exit costs \| Footprint Optimization Program
Restructuring Reserve [Roll Forward]
Beginning balance			0
Costs	22		79
Payments			(74)
Other			1
Ending balance	$ 6		$ 6