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Transformation Programs - Schedule of Restructuring Activities (Details) - USD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2019
Cost Optimization and Prioritization Plan      
Restructuring Reserve      
Charges $ 598 $ 329  
Cost Optimization and Prioritization Plan | Employee Severance      
Restructuring Reserve      
Balance at the beginning of the period 210 0 $ 0
Charges 277 230 0
Cash payments (255) (18) 0
Non-cash items (4) (2) 0
Balance at the end of the period 228 210 0
Total costs incurred to date as of October 31, 2021 507    
Total expected costs to be incurred as of October 31, 2021 700    
Cost Optimization and Prioritization Plan | Infrastructure and other      
Restructuring Reserve      
Balance at the beginning of the period 68 0 0
Charges 321 99 0
Cash payments (127) (3) 0
Non-cash items (73) (28) 0
Balance at the end of the period 189 68 0
Total costs incurred to date as of October 31, 2021 420    
Total expected costs to be incurred as of October 31, 2021 600    
HPE Next Plan      
Restructuring Reserve      
Charges 22 440 219
HPE Next Plan | Employee Severance      
Restructuring Reserve      
Balance at the beginning of the period 144 178 291
Charges 0 341 154
Cash payments (101) (383) (256)
Non-cash items 1 8 (11)
Balance at the end of the period 44 144 178
Total costs incurred to date as of October 31, 2021 1,261    
Total expected costs to be incurred as of October 31, 2021 1,261    
HPE Next Plan | Infrastructure and other      
Restructuring Reserve      
Balance at the beginning of the period 52 42 33
Charges 22 99 65
Cash payments (37) (50) (37)
Non-cash items (4) (39) (19)
Balance at the end of the period 33 $ 52 $ 42
Total costs incurred to date as of October 31, 2021 247    
Total expected costs to be incurred as of October 31, 2021 $ 255