Leases - Supplemental Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 77	$ 52
Right-of-use assets obtained in exchange for operating lease liabilities	$ 81	$ 32