Segment Information - Schedule of Net Revenue by Segment and Business Unit (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Segment Information
Total net revenue	$ 14,586	$ 13,060	$ 43,106	$ 38,129
Total segment net revenue
Segment Information
Total net revenue	14,584	13,064	43,105	38,130
Total segment net revenue | Personal Systems
Segment Information
Total net revenue	9,395	8,385	27,597	24,254
Total segment net revenue | Personal Systems | Notebooks
Segment Information
Total net revenue	5,634	5,008	16,382	14,391
Total segment net revenue | Personal Systems | Desktops
Segment Information
Total net revenue	2,869	2,566	8,576	7,477
Total segment net revenue | Personal Systems | Workstations
Segment Information
Total net revenue	588	530	1,669	1,516
Total segment net revenue | Personal Systems | Other
Segment Information
Total net revenue	304	281	970	870
Total segment net revenue | Printing
Segment Information
Total net revenue	5,188	4,677	15,505	13,869
Total segment net revenue | Printing | Supplies
Segment Information
Total net revenue	3,405	3,145	10,190	9,368
Total segment net revenue | Printing | Commercial Hardware
Segment Information
Total net revenue	1,170	940	3,426	2,715
Total segment net revenue | Printing | Consumer Hardware
Segment Information
Total net revenue	613	592	1,889	1,786
Total segment net revenue | Corporate Investments
Segment Information
Total net revenue	1	2	3	7
Other
Segment Information
Total net revenue	$ 2	$ (4)	$ 1	$ (1)