HPE Next - Transformation Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 3	$ 83
Total	245	$ 0
HPE Next
Restructuring Cost and Reserve [Line Items]
Program management	24
IT costs	33
Restructuring charges	171
Gain on real estate sales	(1)
Other	18
Total	$ 245