HPE Next (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Restructuring Reserve
Charges	$ 2	$ 152	$ 14	$ 304
Cash payments			(540)	$ (688)
HPE Next
Restructuring Reserve
Charges	129		385
HPE Next | Employee Severance
Restructuring Reserve
Balance at the beginning of the period			296
Charges			347
Cash payments			(365)
Non-cash items			(13)
Balance at the end of the period	265		265
Total costs incurred to date, as of July 31, 2018	643		643
Total costs expected to be incurred, as of July 31, 2018	750		750
HPE Next | Infrastructure and other
Restructuring Reserve
Balance at the beginning of the period			0
Charges			38
Cash payments			(8)
Non-cash items			(8)
Balance at the end of the period	22		22
Total costs incurred to date, as of July 31, 2018	38		38
Total costs expected to be incurred, as of July 31, 2018	$ 180		$ 180