HPE Next (Details 2) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Restructuring Reserve
Charges	$ 0	$ 19	$ 388
HPE Next
Restructuring Reserve
Charges	219	531	296
HPE Next | Employee Severance
Restructuring Reserve
Balance at the beginning of the period	291	296	0
Charges	154	470	296
Cash payments	(256)	(452)
Non-cash items	(11)	(23)
Balance at the end of the period	178	291	296
Total costs incurred to date as of October 31, 2019	920
Total expected costs to be incurred as of October 31, 2019	1,200
HPE Next | Infrastructure and other
Restructuring Reserve
Balance at the beginning of the period	33	0	0
Charges	65	61	0
Cash payments	(37)	(14)
Non-cash items	(19)	(14)
Balance at the end of the period	42	$ 33	$ 0
Total costs incurred to date as of October 31, 2019	126
Total expected costs to be incurred as of October 31, 2019	$ 180