Goodwill - Goodwill Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2024	Jul. 31, 2023
Goodwill [Roll Forward]
Beginning balance	$ 2,241	$ 2,048
Acquisitions	124	198
Effect of currency translation adjustment	(8)	(5)
Ending balance	2,357	2,241
Cumulative goodwill impairment as of July 31, 2024	119
United States
Goodwill [Roll Forward]
Beginning balance	2,092	1,894
Acquisitions	91	198
Effect of currency translation adjustment	(1)	0
Ending balance	2,182	2,092
Cumulative goodwill impairment as of July 31, 2024	108
Canada
Goodwill [Roll Forward]
Beginning balance	149	154
Acquisitions	33	0
Effect of currency translation adjustment	(7)	(5)
Ending balance	175	$ 149
Cumulative goodwill impairment as of July 31, 2024	$ 11