HPE Next (Details 1) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 5	$ 2	$ 9	$ 3	$ 113	$ 152	$ 69	$ 83	$ 19	$ 417	$ 417
Total Transformation Costs	$ (74)	$ 131	$ 123	$ 245	$ 328	$ 31	$ 0	$ 0	425	359	$ 0
HPE Next
Restructuring Cost and Reserve [Line Items]
Program management									95	57
IT costs									148	34
Restructuring charges									531	296
Other(2)									56	0
Gain on real estate sales									(405)	(28)
Total Transformation Costs									$ 425	$ 359