v3.25.2
Goodwill - Carrying Value of Goodwill by Reportable Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 31, 2025
Jul. 31, 2024
Jul. 31, 2025
Jul. 31, 2024
Goodwill [Roll Forward]        
Goodwill beginning balance     $ 18,086  
Goodwill acquired during the period     7,042  
Goodwill impairment $ 0 $ 0 (1,361) $ 0
Goodwill ending balance 23,767   23,767  
Goodwill is net of accumulated impairment losses 3,100   3,100  
Reportable Segments        
Goodwill [Roll Forward]        
Goodwill impairment     (1,200)  
Server        
Goodwill [Roll Forward]        
Goodwill beginning balance     10,194  
Goodwill acquired during the period     0  
Goodwill impairment     0  
Goodwill ending balance 10,194   10,194  
Hybrid Cloud        
Goodwill [Roll Forward]        
Goodwill beginning balance     4,839  
Goodwill acquired during the period     0  
Goodwill impairment     (1,361)  
Goodwill ending balance 3,478   3,478  
Networking        
Goodwill [Roll Forward]        
Goodwill beginning balance     2,909  
Goodwill acquired during the period     7,042  
Goodwill impairment     0  
Goodwill ending balance 9,951   9,951  
Financial Services        
Goodwill [Roll Forward]        
Goodwill beginning balance     144  
Goodwill acquired during the period     0  
Goodwill impairment     0  
Goodwill ending balance 144   144  
Corporate Investments and Other        
Goodwill [Roll Forward]        
Goodwill beginning balance     0  
Goodwill acquired during the period     0  
Goodwill impairment     0  
Goodwill ending balance $ 0   $ 0