Revenue and segment information - Segment Results (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Net sales:
Total net sales	$ 7,621	$ 7,308	$ 22,265	$ 21,689
Adjusted operating profit:
Central and other costs	(19)	(17)	(50)	(47)
Restructuring expenses	70	12	73	20
Amortization of acquired intangible assets	(39)	(37)	(116)	(106)
Interest expense, net	(46)	(43)	(140)	(132)
Other (expense) income, net	(3)	(1)	10	(4)
Income before income taxes	557	581	1,551	1,705
United States
Net sales:
Total net sales	7,288	6,974	21,210	20,667
Adjusted operating profit:
Adjusted operating profit:	726	685	1,878	1,976
Canada
Net sales:
Total net sales	333	334	1,055	1,022
Adjusted operating profit:
Adjusted operating profit:	$ 8	$ 6	$ 42	$ 38