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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2025
Apr. 30, 2024
Jul. 31, 2024
Income Tax Disclosure [Abstract]          
Tax shortfalls (benefits) on share-based compensation $ 18 $ 40 $ 75 $ 123  
Effective tax rate 23.00% 22.00% 22.00% 19.00%  
Effective tax rate, excluding discrete tax benefits 24.00% 24.00%      
Total amount of unrecognized tax benefits $ 409   $ 409    
Favorable net impact to income tax expense due to recognition of tax benefits 273   273    
Long-term liability for uncertain tax positions $ 61   $ 61   $ 66