HPE Next (Details 2) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Restructuring Reserve
Charges	$ 417	$ 417	$ 197
HPE Next
Restructuring Reserve
Charges	296
HPE Next | Employee Severance
Restructuring Reserve
Balance at the beginning of the period	0
Charges	296
Balance at the end of the period	296	0
Total costs incurred to date as of October 31, 2017	296
Total expected costs to be incurred as of October 31, 2017	750
HPE Next | Infrastructure and other
Restructuring Reserve
Balance at the beginning of the period	0
Charges	0
Balance at the end of the period	0	$ 0
Total costs incurred to date as of October 31, 2017	0
Total expected costs to be incurred as of October 31, 2017	$ 180