Segment Information - Schedule of Net Revenue by Segment and Business Unit (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Segment Information
Total net revenue	$ 13,060	$ 11,892	$ 38,129	$ 35,726
Total segment net revenue
Segment Information
Total net revenue	13,104	11,935	38,221	35,677
Total segment net revenue | Personal Systems
Segment Information
Total net revenue	8,404	7,512	24,290	21,969
Total segment net revenue | Personal Systems | Notebooks
Segment Information
Total net revenue	5,008	4,303	14,391	12,346
Total segment net revenue | Personal Systems | Desktops
Segment Information
Total net revenue	2,566	2,455	7,477	7,384
Total segment net revenue | Personal Systems | Workstations
Segment Information
Total net revenue	530	476	1,516	1,381
Total segment net revenue | Personal Systems | Other
Segment Information
Total net revenue	300	278	906	858
Total segment net revenue | Printing
Segment Information
Total net revenue	4,698	4,423	13,924	13,702
Total segment net revenue | Printing | Supplies
Segment Information
Total net revenue	3,120	2,840	9,284	9,040
Total segment net revenue | Printing | Commercial Hardware
Segment Information
Total net revenue	986	1,007	2,854	2,928
Total segment net revenue | Printing | Consumer Hardware
Segment Information
Total net revenue	592	576	1,786	1,734
Total segment net revenue | Corporate Investments
Segment Information
Total net revenue	2	0	7	6
Net revenue eliminations and other
Segment Information
Total net revenue	$ (44)	$ (43)	$ (92)	$ 49