HPE Next (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2	$ 152	$ 14	$ 304
Total	131	$ 31	499	$ 31
HPE Next
Restructuring Cost and Reserve [Line Items]
Program management	28		82
IT costs	38		107
Restructuring charges	129		385
Gain on real estate sales	(77)		(114)
Other	13		39
Total	$ 131		$ 499