Segment Information - Segment Operating Results from Continuing Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Segment Information
Net revenue	$ 11,892	$ 12,362	$ 35,726	$ 39,197
Earnings (loss) from operations	1,117	1,007	2,886	3,122
Operating Segments
Segment Information
Net revenue	11,935	12,670	35,677	40,109
Earnings (loss) from operations	1,201	1,095	3,229	3,637
Operating Segments | Personal Systems
Segment Information
Net revenue	7,512	7,505	21,969	23,826
Earnings (loss) from operations	333	211	804	741
Operating Segments | Printing
Segment Information
Net revenue	4,423	5,163	13,702	16,267
Earnings (loss) from operations	903	896	2,491	2,928
Operating Segments | Corporate Investments
Segment Information
Net revenue	0	2	6	16
Earnings (loss) from operations	(35)	(12)	(66)	(32)
Intersegment Eliminations and Other
Segment Information
Net revenue	$ (43)	$ (308)	$ 49	$ (912)