Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Millions	Oct. 31, 2025	Jul. 31, 2025
Leases [Abstract]
Operating lease right-of-use assets	$ 596	$ 541
Other current liabilities	78	69
Operating lease liabilities	643	597
Total operating lease liabilities	$ 721	$ 666
Operating lease, liability, current, statement of financial position	Other Liabilities, Current	Other Liabilities, Current