Segment Information (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Segment Reporting Information
Net revenue	$ 28,154	$ 28,359
Operating segments
Segment Reporting Information
Net revenue	29,007	29,076
Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(853)	(717)
Enterprise Group
Segment Reporting Information
Net revenue	6,791	6,748
Enterprise Group | Operating segments
Segment Reporting Information
Net revenue	6,993	6,948
Enterprise Group | Operating segments | Industry Standard Servers
Segment Reporting Information
Net revenue	3,178	2,994
Enterprise Group | Operating segments | Technology Services
Segment Reporting Information
Net revenue	2,123	2,207
Enterprise Group | Operating segments | Storage
Segment Reporting Information
Net revenue	834	833
Enterprise Group | Operating segments | Networking
Segment Reporting Information
Net revenue	630	608
Enterprise Group | Operating segments | Business Critical Systems
Segment Reporting Information
Net revenue	228	306
Enterprise Group | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(202)	(200)
Enterprise Services
Segment Reporting Information
Net revenue	5,283	5,792
Enterprise Services | Operating segments
Segment Reporting Information
Net revenue	5,595	6,038
Enterprise Services | Operating segments | Infrastructure Technology Outsourcing
Segment Reporting Information
Net revenue	3,501	3,855
Enterprise Services | Operating segments | Application and Business Services
Segment Reporting Information
Net revenue	2,094	2,183
Enterprise Services | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(312)	(246)
Software
Segment Reporting Information
Net revenue	846	897
Software | Operating segments
Segment Reporting Information
Net revenue	916	951
Software | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(70)	(54)
HP Financial Services
Segment Reporting Information
Net revenue	854	946
HP Financial Services | Operating segments
Segment Reporting Information
Net revenue	870	957
HP Financial Services | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(16)	(11)
Corporate Investments
Segment Reporting Information
Net revenue	288	4
Corporate Investments | Operating segments
Segment Reporting Information
Net revenue	288	4
Personal Systems and Printing | Operating segments
Segment Reporting Information
Net revenue	14,345	14,178
Personal Systems and Printing | Personal Systems
Segment Reporting Information
Net revenue	8,310	8,068
Personal Systems and Printing | Personal Systems | Operating segments
Segment Reporting Information
Net revenue	8,530	8,232
Personal Systems and Printing | Personal Systems | Operating segments | Notebooks
Segment Reporting Information
Net revenue	4,335	4,128
Personal Systems and Printing | Personal Systems | Operating segments | Desktops
Segment Reporting Information
Net revenue	3,274	3,321
Personal Systems and Printing | Personal Systems | Operating segments | Workstations
Segment Reporting Information
Net revenue	533	535
Personal Systems and Printing | Personal Systems | Operating segments | Other
Segment Reporting Information
Net revenue	388	248
Personal Systems and Printing | Personal Systems | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(220)	(164)
Personal Systems and Printing | Printing
Segment Reporting Information
Net revenue	5,782	5,904
Personal Systems and Printing | Printing | Operating segments
Segment Reporting Information
Net revenue	5,815	5,946
Personal Systems and Printing | Printing | Operating segments | Supplies
Segment Reporting Information
Net revenue	3,795	3,893
Personal Systems and Printing | Printing | Operating segments | Commercial Hardware
Segment Reporting Information
Net revenue	1,347	1,374
Personal Systems and Printing | Printing | Operating segments | Consumer Hardware
Segment Reporting Information
Net revenue	673	679
Personal Systems and Printing | Printing | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	$ (33)	$ (42)