v3.26.1
Acquisitions and Dispositions (Details)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jul. 02, 2025
USD ($)
$ / shares
Apr. 30, 2026
USD ($)
Apr. 30, 2025
USD ($)
Apr. 30, 2026
USD ($)
Apr. 30, 2025
USD ($)
May 28, 2026
USD ($)
May 13, 2026
USD ($)
Nov. 28, 2025
USD ($)
option
Nov. 17, 2025
USD ($)
option
counterparty
Business Combination [Line Items]                  
Purchase price and other currency adjustments       $ 104          
Payments for merger related costs   $ 108 $ 39 231 $ 72        
Juniper Networks, Inc                  
Business Combination [Line Items]                  
Business acquisition, share price (in USD per share) | $ / shares $ 40.00                
Payments to acquire businesses, gross $ 13,400                
Purchase price and other currency adjustments       $ 111          
Venture Capital Partnership | Subsequent Event                  
Business Combination [Line Items]                  
Put share purchase agreement, issued capital (as a percent)             0.138    
H3C | H3C | UNIS                  
Business Combination [Line Items]                  
Equity method investment, put share purchase agreement, number of option rights | option                 3
Amended and Restated Put Share Purchase Agreement                  
Business Combination [Line Items]                  
Equity method investment, number of counterparties | counterparty                 5
Put share purchase agreement, issued capital (as a percent)                 0.10
Put share purchase agreement                 $ 714
Amended and Restated Put Share Purchase Agreement | H3C                  
Business Combination [Line Items]                  
Put share purchase agreement, issued capital (as a percent)               0.09  
Put share purchase agreement               $ 643  
Amended and Restated Put Share Purchase Agreement | H3C | Subsequent Event                  
Business Combination [Line Items]                  
Put share purchase agreement, issued capital (as a percent)           0.052      
Put share purchase agreement           $ 370 $ 987    
Subsequent Option Agreement | H3C | H3C                  
Business Combination [Line Items]                  
Equity method investment, put share purchase agreement, number of share repurchase agreements | option               3  
Subsequent Option Agreement | H3C | H3C | UNIS                  
Business Combination [Line Items]                  
Equity method investment, put share purchase agreement, number of share repurchase agreements | option               1