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Transformation Programs - Schedule of Restructuring Activity (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Apr. 30, 2021
Apr. 30, 2020
HPE Next        
Restructuring Reserve        
Charges $ 2 $ 164 $ 19 $ 248
HPE Next | Employee Severance        
Restructuring Reserve        
Balance at the beginning of the period     144  
Charges     0  
Cash payments     (81)  
Non-cash items     4  
Balance at the end of the period 67   67  
Total costs incurred to date, as of April 30, 2021 1,261   1,261  
Total expected costs to be incurred as of April 30, 2021 1,261   1,261  
HPE Next | Infrastructure and other        
Restructuring Reserve        
Balance at the beginning of the period     52  
Charges     19  
Cash payments     (20)  
Non-cash items     (3)  
Balance at the end of the period 48   48  
Total costs incurred to date, as of April 30, 2021 244   244  
Total expected costs to be incurred as of April 30, 2021 248   248  
Cost optimization and prioritization plan        
Restructuring Reserve        
Charges 132   347  
Cost optimization and prioritization plan | Employee Severance        
Restructuring Reserve        
Balance at the beginning of the period     210  
Charges     105  
Cash payments     (172)  
Non-cash items     3  
Balance at the end of the period 146   146  
Total costs incurred to date, as of April 30, 2021 335   335  
Total expected costs to be incurred as of April 30, 2021 700   700  
Cost optimization and prioritization plan | Infrastructure and other        
Restructuring Reserve        
Balance at the beginning of the period     68  
Charges     242  
Cash payments     (49)  
Non-cash items     (63)  
Balance at the end of the period 198   198  
Total costs incurred to date, as of April 30, 2021 341   341  
Total expected costs to be incurred as of April 30, 2021 $ 610   $ 610