Property, plant and equipment - Schedule of PPE (Details) - USD ($) $ in Millions	Jul. 31, 2024	Jul. 31, 2023
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 3,284	$ 3,001
Less: Accumulated depreciation	(1,532)	(1,406)
Property, plant and equipment, net	1,752	1,595
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment	388	348
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,185	1,134
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	618	529
Plant and machinery
Property, Plant and Equipment [Line Items]
Property, plant and equipment	927	834
Other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 166	$ 156