Segment Information - Schedule of Net Revenue by Segment and Business Unit (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Segment Reporting Information [Line Items]
Net revenue	$ 7,674	$ 6,902
Operating Segment
Segment Reporting Information [Line Items]
Net revenue	7,838	7,148
Elimination of intersegment net revenue and other
Segment Reporting Information [Line Items]
Net revenue	164	246
Total Hybrid IT | Total Hybrid IT Product | Operating Segment
Segment Reporting Information [Line Items]
Net revenue	4,502	3,956
Total Hybrid IT | Compute | Operating Segment
Segment Reporting Information [Line Items]
Net revenue	3,492	3,143
Total Hybrid IT | Storage | Operating Segment
Segment Reporting Information [Line Items]
Net revenue	948	764
Total Hybrid IT | DC Networking | Operating Segment
Segment Reporting Information [Line Items]
Net revenue	62	49
Total Hybrid IT | Pointnext | Operating Segment
Segment Reporting Information [Line Items]
Net revenue	1,829	1,799
Hybrid IT
Segment Reporting Information [Line Items]
Net revenue	6,176	5,536
Hybrid IT | Operating Segment
Segment Reporting Information [Line Items]
Net revenue	6,331	5,755
Hybrid IT | Elimination of intersegment net revenue and other
Segment Reporting Information [Line Items]
Net revenue	155	219
Total Intelligent Edge | HPE Aruba Product | Operating Segment
Segment Reporting Information [Line Items]
Net revenue	549	503
Total Intelligent Edge | HPE Aruba Services | Operating Segment
Segment Reporting Information [Line Items]
Net revenue	71	67
Intelligent Edge
Segment Reporting Information [Line Items]
Net revenue	613	562
Intelligent Edge | Operating Segment
Segment Reporting Information [Line Items]
Net revenue	620	570
Intelligent Edge | Elimination of intersegment net revenue and other
Segment Reporting Information [Line Items]
Net revenue	7	8
Financial Services
Segment Reporting Information [Line Items]
Net revenue	886	804
Financial Services | Operating Segment
Segment Reporting Information [Line Items]
Net revenue	888	823
Financial Services | Elimination of intersegment net revenue and other
Segment Reporting Information [Line Items]
Net revenue	2	19
Corporate Investments
Segment Reporting Information [Line Items]
Net revenue	(1)	0
Corporate Investments | Operating Segment
Segment Reporting Information [Line Items]
Net revenue	(1)	0
Corporate Investments | Elimination of intersegment net revenue and other
Segment Reporting Information [Line Items]
Net revenue	$ 0	$ 0