Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024	Jul. 31, 2024
Income Tax Disclosure [Abstract]
Tax shortfalls (benefits) on share-based compensation	$ 29	$ 56	$ 57	$ 83
Effective tax rate	17.00%		15.00%	4.00%
Effective tax rate, excluding discrete tax benefits	24.00%		24.00%
Income tax provision	$ 100	1	$ 116	$ 24
Income before income taxes	571	$ 354	784	$ 618
Total amount of unrecognized tax benefits					$ 327
Favorable net impact to income tax expense due to recognition of tax benefits					210
Long-term liability for uncertain tax positions	$ 66		$ 66		$ 66