HPE Next (Details 3) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Restructuring Reserve
Charges	$ 0	$ 10	$ 0	$ 15
Cash payments			(198)	(414)
HPE Next
Restructuring Reserve
Charges	18	$ 85	51	$ 256
HPE Next | Employee Severance
Restructuring Reserve
Balance at the beginning of the period			291
Charges			43
Cash payments			(162)
Non-cash items			(8)
Balance at the end of the period	164		164
Total costs incurred to date, as of April 30, 2019	809		809
Total costs expected to be incurred, as of April 30, 2019	1,200		1,200
HPE Next | Infrastructure and other
Restructuring Reserve
Balance at the beginning of the period			33
Charges			8
Cash payments			(12)
Non-cash items			(2)
Balance at the end of the period	27		27
Total costs incurred to date, as of April 30, 2019	69		69
Total costs expected to be incurred, as of April 30, 2019	$ 180		$ 180