Revenue and segment information - Items not Allocated (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 31, 2024	Oct. 31, 2023
Net sales:
Total net sales	$ 7,772	$ 7,708
Adjusted operating profit:
Central and other costs	(14)	(16)
Amortization of acquired intangible assets	(38)	(34)
Interest expense, net	(46)	(45)
Other income (expense), net	5	(3)
Income before income taxes	624	691
Corporate restructurings
Adjusted operating profit:
Corporate restructurings	(3)	0
United States
Net sales:
Total net sales	7,369	7,329
Adjusted operating profit:
Adjusted operating profit:	697	766
Canada
Net sales:
Total net sales	403	379
Adjusted operating profit:
Adjusted operating profit:	$ 23	$ 23