Segment Information - Schedule of Net Revenue by Segment and Business Unit (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Segment Information
Total net revenue	$ 11,892	$ 12,362	$ 35,726	$ 39,197
Total segment net revenue
Segment Information
Total net revenue	11,935	12,670	35,677	40,109
Total segment net revenue | Personal Systems
Segment Information
Total net revenue	7,512	7,505	21,969	23,826
Total segment net revenue | Personal Systems | Notebooks
Segment Information
Total net revenue	4,303	3,993	12,346	12,887
Total segment net revenue | Personal Systems | Desktops
Segment Information
Total net revenue	2,455	2,700	7,384	8,411
Total segment net revenue | Personal Systems | Workstations
Segment Information
Total net revenue	476	507	1,381	1,546
Total segment net revenue | Personal Systems | Other
Segment Information
Total net revenue	278	305	858	982
Total segment net revenue | Printing
Segment Information
Total net revenue	4,423	5,163	13,702	16,267
Total segment net revenue | Printing | Supplies
Segment Information
Total net revenue	2,840	3,455	9,040	10,740
Total segment net revenue | Printing | Commercial Hardware
Segment Information
Total net revenue	1,290	1,330	3,736	4,100
Total segment net revenue | Printing | Consumer Hardware
Segment Information
Total net revenue	293	378	926	1,427
Total segment net revenue | Corporate Investments
Segment Information
Total net revenue	0	2	6	16
Intersegment net revenue eliminations and other
Segment Information
Total net revenue	$ (43)	$ (308)	$ 49	$ (912)