Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Millions	Apr. 30, 2023	Jul. 31, 2022
Leases [Abstract]
Operating lease right-of-use assets	$ 485	$ 549
Other current liabilities	87	84
Operating lease liabilities	499	542
Total operating lease liabilities	$ 586	$ 626
Operating lease, liability, current, statement of financial position	Other Liabilities, Current