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Stockholders' Equity - Narrative (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended
Feb. 28, 2026
Feb. 28, 2026
Jan. 31, 2026
Jan. 31, 2025
Jan. 31, 2026
Jan. 31, 2025
Aug. 19, 2025
Options Outstanding              
Common stock repurchased (in shares)         2.8    
Total stock repurchased, including amounts not included under repurchase plans         $ 1,800    
Stock repurchase program, remaining authorized repurchase amount     $ 3,500   $ 3,500   $ 3,200
Common stock, dividends, per share, cash paid (in dollars per share)         $ 2.40    
Quarterly cash dividends declared     $ 341 $ 303 $ 684 $ 598  
Cash dividends declared per common share (in dollars per share)     $ 1.20 $ 1.04 $ 2.40 $ 2.08  
Subsequent Event              
Options Outstanding              
Total stock repurchased, including amounts not included under repurchase plans   $ 30          
Cash dividends declared per common share (in dollars per share) $ 1.20