Description of Business and Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022	Jul. 31, 2022
Accounting Policies [Abstract]
Revenue recognized	$ 158	$ 157	$ 693	$ 578
Description of timing			12 months
Deferred revenue	$ 4		$ 4		$ 6