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Description of Business and Summary of Significant Accounting Policies - Schedule of Basic and Diluted Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jan. 31, 2026
Jan. 31, 2025
Jan. 31, 2026
Jan. 31, 2025
Numerator:        
Net income $ 693 $ 471 $ 1,139 $ 668
Shares used in basic per share calculations:        
Weighted-average common shares outstanding (in shares) 278 280 279 280
Shares used in diluted per share calculations:        
Weighted-average common shares outstanding (in shares) 278 280 279 280
Dilutive potential common equivalent shares from share-based awards (in shares) 2 3 2 3
Dilutive weighted-average common shares outstanding (in shares) 280 283 281 283
Basic and diluted net income per share:        
Basic net income per share (in dollars per share) $ 2.49 $ 1.68 $ 4.09 $ 2.38
Diluted net income per share (in dollars per share) $ 2.48 $ 1.67 $ 4.06 $ 2.36
Shares excluded from diluted net income per share:        
Weighted-average share-based awards that have been excluded from dilutive common equivalent shares outstanding due to their anti-dilutive effect (in shares) 3 0 3 0