Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023	Jul. 31, 2023
Income Tax Disclosure [Abstract]
Tax shortfalls (benefits) on share-based compensation	$ (56)	$ 9	$ (83)	$ 2
Effective tax rate	4.00%	26.00%		20.00%
Income before income taxes	$ 354	$ 228	$ 618	$ 260
Effective tax rate, excluding discrete tax benefits	24.00%	24.00%	24.00%	24.00%
Total amount of unrecognized tax benefits					$ 246
Favorable net impact to income tax expense due to recognition of tax benefits	$ 152		$ 152
Long-term liability for uncertain tax positions	61		61		$ 85
Income tax provision	$ 1	$ 60	$ 24	$ 52