Stockholders' Equity - Schedule of Total Share-based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024
Options Outstanding
Total share-based compensation expense	$ 498	$ 475	$ 1,009	$ 970
Cost of revenue
Options Outstanding
Total share-based compensation expense	110	101	221	202
Selling and marketing
Options Outstanding
Total share-based compensation expense	136	125	273	248
Research and development
Options Outstanding
Total share-based compensation expense	161	162	322	323
General and administrative
Options Outstanding
Total share-based compensation expense	$ 91	$ 87	$ 193	$ 197