Segment Information (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Segment Reporting Information
Net revenue	$ 112,298	$ 120,357	$ 127,245
Operating segments
Segment Reporting Information
Net revenue	115,194	123,537	130,687
Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(2,896)	(3,180)	(3,442)
Enterprise Group
Segment Reporting Information
Net revenue	27,303	28,628	30,135
Enterprise Group | Operating segments
Segment Reporting Information
Net revenue	28,183	29,779	31,460
Enterprise Group | Operating segments | Industry Standard Servers
Segment Reporting Information
Net revenue	12,102	12,582	13,521
Enterprise Group | Operating segments | Technology Services
Segment Reporting Information
Net revenue	8,890	9,288	9,396
Enterprise Group | Operating segments | Storage
Segment Reporting Information
Net revenue	3,475	3,815	4,056
Enterprise Group | Operating segments | Networking
Segment Reporting Information
Net revenue	2,526	2,482	2,392
Enterprise Group | Operating segments | Business Critical Systems
Segment Reporting Information
Net revenue	1,190	1,612	2,095
Enterprise Group | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(880)	(1,151)	(1,325)
Enterprise Services
Segment Reporting Information
Net revenue	23,041	25,091	25,938
Enterprise Services | Operating segments
Segment Reporting Information
Net revenue	23,520	25,609	26,268
Enterprise Services | Operating segments | Infrastructure Technology Outsourcing
Segment Reporting Information
Net revenue	14,682	15,792	16,290
Enterprise Services | Operating segments | Application and Business Services
Segment Reporting Information
Net revenue	8,838	9,817	9,978
Enterprise Services | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(479)	(518)	(330)
Software
Segment Reporting Information
Net revenue	3,593	3,757	3,128
Software | Operating segments
Segment Reporting Information
Net revenue	3,913	4,060	3,367
Software | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(320)	(303)	(239)
HP Financial Services
Segment Reporting Information
Net revenue	3,570	3,784	3,568
HP Financial Services | Operating segments
Segment Reporting Information
Net revenue	3,629	3,819	3,596
HP Financial Services | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(59)	(35)	(28)
Corporate Investments
Segment Reporting Information
Net revenue	24	57	154
Corporate Investments | Operating segments
Segment Reporting Information
Net revenue	24	58	166
Corporate Investments | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue		(1)	(12)
Printing and Personal Systems Group | Operating segments
Segment Reporting Information
Net revenue	55,925	60,212	65,830
Printing and Personal Systems Group | Personal Systems
Segment Reporting Information
Net revenue	31,124	34,774	38,448
Printing and Personal Systems Group | Personal Systems | Operating segments
Segment Reporting Information
Net revenue	32,071	35,725	39,654
Printing and Personal Systems Group | Personal Systems | Operating segments | Notebooks
Segment Reporting Information
Net revenue	16,029	18,830	21,319
Printing and Personal Systems Group | Personal Systems | Operating segments | Desktops
Segment Reporting Information
Net revenue	12,844	13,888	15,260
Printing and Personal Systems Group | Personal Systems | Operating segments | Workstations
Segment Reporting Information
Net revenue	2,147	2,148	2,216
Printing and Personal Systems Group | Personal Systems | Operating segments | Other
Segment Reporting Information
Net revenue	1,051	859	859
Printing and Personal Systems Group | Personal Systems | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(947)	(951)	(1,206)
Printing and Personal Systems Group | Printing
Segment Reporting Information
Net revenue	23,643	24,266	25,874
Printing and Personal Systems Group | Printing | Operating segments
Segment Reporting Information
Net revenue	23,854	24,487	26,176
Printing and Personal Systems Group | Printing | Operating segments | Supplies
Segment Reporting Information
Net revenue	15,716	16,151	17,154
Printing and Personal Systems Group | Printing | Operating segments | Commercial Hardware
Segment Reporting Information
Net revenue	5,702	5,895	6,183
Printing and Personal Systems Group | Printing | Operating segments | Consumer Hardware
Segment Reporting Information
Net revenue	2,436	2,441	2,839
Printing and Personal Systems Group | Printing | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	$ (211)	$ (221)	$ (302)