Segment Information - Schedule of Net Revenue by Segment and Business Unit (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Segment Reporting Information [Line Items]
Net revenue	$ 7,553	$ 7,674
Hybrid IT
Segment Reporting Information [Line Items]
Net revenue	5,832	6,000
Intelligent Edge
Segment Reporting Information [Line Items]
Net revenue	687	652
Financial Services
Segment Reporting Information [Line Items]
Net revenue	916	886
Corporate Investments
Segment Reporting Information [Line Items]
Net revenue	118	136
Operating Segment
Segment Reporting Information [Line Items]
Net revenue	7,693	7,838
Operating Segment | Hybrid IT
Segment Reporting Information [Line Items]
Net revenue	5,970	6,158
Operating Segment | Hybrid IT | Total Hybrid IT Product
Segment Reporting Information [Line Items]
Net revenue	4,377	4,466
Operating Segment | Hybrid IT | Compute
Segment Reporting Information [Line Items]
Net revenue	3,402	3,518
Operating Segment | Hybrid IT | Storage
Segment Reporting Information [Line Items]
Net revenue	975	948
Operating Segment | Hybrid IT | Pointnext
Segment Reporting Information [Line Items]
Net revenue	1,593	1,692
Operating Segment | Intelligent Edge
Segment Reporting Information [Line Items]
Net revenue	686	656
Operating Segment | Intelligent Edge | HPE Aruba Product
Segment Reporting Information [Line Items]
Net revenue	597	582
Operating Segment | Intelligent Edge | HPE Aruba Services
Segment Reporting Information [Line Items]
Net revenue	89	74
Operating Segment | Financial Services
Segment Reporting Information [Line Items]
Net revenue	919	888
Operating Segment | Corporate Investments
Segment Reporting Information [Line Items]
Net revenue	118	136
Elimination of intersegment net revenue and other
Segment Reporting Information [Line Items]
Net revenue	140	164
Elimination of intersegment net revenue and other | Hybrid IT
Segment Reporting Information [Line Items]
Net revenue	138	158
Elimination of intersegment net revenue and other | Intelligent Edge
Segment Reporting Information [Line Items]
Net revenue	(1)	4
Elimination of intersegment net revenue and other | Financial Services
Segment Reporting Information [Line Items]
Net revenue	3	2
Elimination of intersegment net revenue and other | Corporate Investments
Segment Reporting Information [Line Items]
Net revenue	$ 0	$ 0