Acquisitions - Net Cash Outflow (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2023
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Purchase consideration	$ 303	$ 261
Cash, cash equivalents and bank overdrafts acquired	(2)	(1)
Cash consideration paid, net of cash acquired	301	260	$ 616
Deferred and contingent consideration paid for prior years’ acquisitions	41	44
Net cash outflow in respect of the purchase of businesses	$ 342	$ 304