Acquisitions - Net Cash Outflow (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2022
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Purchase consideration	$ 261	$ 619
Cash, cash equivalents and bank overdrafts acquired	(1)	(3)
Cash consideration paid, net of cash acquired	260	616	$ 650
Deferred and contingent consideration paid for prior years’ acquisitions	44	34
Net cash outflow in respect of the purchase of businesses	$ 304	$ 650