Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023	Jul. 31, 2023
Income Tax Disclosure [Abstract]
Tax shortfalls (benefits) on share-based compensation	$ 40	$ 17	$ 123	$ 15
Effective tax rate	22.00%	24.00%	19.00%	23.00%
Income before income taxes	$ 3,072	$ 2,734	$ 3,690	$ 2,994
Effective tax rate, excluding discrete tax benefits	24.00%	24.00%	24.00%	24.00%
Total amount of unrecognized tax benefits	$ 309		$ 309
Favorable net impact to income tax expense due to recognition of tax benefits	210		210
Long-term liability for uncertain tax positions	61		61		$ 85
Income tax provision	$ 683	$ 647	$ 707	$ 699