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Stockholders' Equity - Schedule of Total Share-based Compensation Expense (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2025
Apr. 30, 2024
Options Outstanding        
Total share-based compensation expense $ 469 $ 451 $ 1,478 $ 1,421
Cost of revenue        
Options Outstanding        
Total share-based compensation expense 101 98 322 300
Selling and marketing        
Options Outstanding        
Total share-based compensation expense 131 121 404 369
Research and development        
Options Outstanding        
Total share-based compensation expense 148 155 470 478
General and administrative        
Options Outstanding        
Total share-based compensation expense $ 89 $ 77 $ 282 $ 274