HPE Next (Details 2) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	$ 5
Total	78	245
Non-service net periodic benefit credit	(16)	(33)
HPE Next
Restructuring Cost and Reserve [Line Items]
Program management	11	24
IT costs	27	33
Restructuring charges	33	171
Gain on real estate sales	0	(1)
Other	12	18
Total	83	$ 245
Non-service net periodic benefit credit	$ 5