Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2014 segment	Jan. 31, 2013
Segment Information
Number of reportable segments	7
Segment Reporting Information
Net revenue	$ 28,154	$ 28,359
Earnings (loss) from operations	1,997	1,752
Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(853)	(717)
Operating segments
Segment Reporting Information
Net revenue	29,007	29,076
Earnings (loss) from operations	2,688	2,529
Enterprise Group
Segment Reporting Information
Net revenue	6,791	6,748
Enterprise Group | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(202)	(200)
Enterprise Group | Operating segments
Segment Reporting Information
Net revenue	6,993	6,948
Earnings (loss) from operations	1,006	1,070
Enterprise Services
Segment Reporting Information
Net revenue	5,283	5,792
Enterprise Services | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(312)	(246)
Enterprise Services | Operating segments
Segment Reporting Information
Net revenue	5,595	6,038
Earnings (loss) from operations	57	76
Software
Segment Reporting Information
Net revenue	846	897
Software | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(70)	(54)
Software | Operating segments
Segment Reporting Information
Net revenue	916	951
Earnings (loss) from operations	145	155
HP Financial Services
Segment Reporting Information
Net revenue	854	946
HP Financial Services | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(16)	(11)
HP Financial Services | Operating segments
Segment Reporting Information
Net revenue	870	957
Earnings (loss) from operations	101	101
Corporate Investments
Segment Reporting Information
Net revenue	288	4
Corporate Investments | Operating segments
Segment Reporting Information
Net revenue	288	4
Earnings (loss) from operations	121	(73)
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 | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(220)	(164)
Personal Systems and Printing | Personal Systems | Operating segments
Segment Reporting Information
Net revenue	8,530	8,232
Earnings (loss) from operations	279	233
Personal Systems and Printing | Printing
Segment Reporting Information
Net revenue	5,782	5,904
Personal Systems and Printing | Printing | Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(33)	(42)
Personal Systems and Printing | Printing | Operating segments
Segment Reporting Information
Net revenue	5,815	5,946
Earnings (loss) from operations	$ 979	$ 967