Segment Information - Schedule of Net Revenue by Segment and Business Unit (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Segment Information
Total net revenue	$ 12,385	$ 11,588	$ 25,069	$ 23,834
Total segment net revenue
Segment Information
Total net revenue	12,408	11,630	25,117	23,742
Total segment net revenue | Personal Systems
Segment Information
Total net revenue	7,662	6,990	15,886	14,457
Total segment net revenue | Personal Systems | Notebooks
Segment Information
Total net revenue	4,493	3,838	9,383	8,043
Total segment net revenue | Personal Systems | Desktops
Segment Information
Total net revenue	2,377	2,402	4,911	4,929
Total segment net revenue | Personal Systems | Workstations
Segment Information
Total net revenue	495	461	986	905
Total segment net revenue | Personal Systems | Other
Segment Information
Total net revenue	297	289	606	580
Total segment net revenue | Printing
Segment Information
Total net revenue	4,743	4,637	9,226	9,279
Total segment net revenue | Printing | Supplies
Segment Information
Total net revenue	3,157	3,099	6,164	6,200
Total segment net revenue | Printing | Commercial Hardware
Segment Information
Total net revenue	982	957	1,868	1,921
Total segment net revenue | Printing | Consumer Hardware
Segment Information
Total net revenue	604	581	1,194	1,158
Total segment net revenue | Corporate Investments
Segment Information
Total net revenue	3	3	5	6
Net revenue eliminations and other
Segment Information
Total net revenue	$ (23)	$ (42)	$ (48)	$ 92