Property, plant and equipment - Schedule of PPE (Details) - USD ($) $ in Millions	Jul. 31, 2025	Jul. 31, 2024
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 3,509	$ 3,284
Less: Accumulated depreciation	(1,663)	(1,532)
Property, plant and equipment, net	1,846	1,752
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment	399	388
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,206	1,185
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	719	618
Plant and machinery
Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,012	927
Other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 173	$ 166