Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014 segment	Jul. 31, 2013
Segment Information
Number of reportable segments			7
Segment Reporting Information
Net revenue	$ 27,585	$ 27,226	$ 83,048	$ 83,167
Earnings (loss) from operations	1,458	1,855	5,277	5,208
Intersegment net revenue and other
Segment Reporting Information
Net revenue	(955)	(946)	(2,712)	(2,570)
Operating segments
Segment Reporting Information
Net revenue	28,540	28,172	85,760	85,737
Earnings (loss) from operations	2,733	2,588	8,143	7,763
Enterprise Group
Segment Reporting Information
Net revenue	6,666	6,504	19,852	19,778
Enterprise Group | Intersegment net revenue and other
Segment Reporting Information
Net revenue	(228)	(260)	(692)	(728)
Enterprise Group | Operating segments
Segment Reporting Information
Net revenue	6,894	6,764	20,544	20,506
Earnings (loss) from operations	966	1,023	2,933	3,167
Enterprise Services
Segment Reporting Information
Net revenue	5,328	5,714	16,054	17,395
Enterprise Services | Intersegment net revenue and other
Segment Reporting Information
Net revenue	(262)	(258)	(833)	(748)
Enterprise Services | Operating segments
Segment Reporting Information
Net revenue	5,590	5,972	16,887	18,143
Earnings (loss) from operations	228	192	429	424
Software
Segment Reporting Information
Net revenue	873	912	2,610	2,703
Software | Intersegment net revenue and other
Segment Reporting Information
Net revenue	(86)	(98)	(236)	(225)
Software | Operating segments
Segment Reporting Information
Net revenue	959	1,010	2,846	2,928
Earnings (loss) from operations	203	203	534	538
HP Financial Services
Segment Reporting Information
Net revenue	833	863	2,534	2,675
HP Financial Services | Intersegment net revenue and other
Segment Reporting Information
Net revenue	(22)	(16)	(58)	(42)
HP Financial Services | Operating segments
Segment Reporting Information
Net revenue	855	879	2,592	2,717
Earnings (loss) from operations	79	99	279	297
Corporate Investments
Segment Reporting Information
Net revenue	3	5	297	19
Corporate Investments | Operating segments
Segment Reporting Information
Net revenue	3	5	297	19
Earnings (loss) from operations	(115)	(82)	(92)	(230)
Printing and Personal Systems | Operating segments
Segment Reporting Information
Net revenue	14,239	13,542	42,594	41,424
Printing and Personal Systems | Personal Systems
Segment Reporting Information
Net revenue	8,368	7,470	24,638	22,889
Printing and Personal Systems | Personal Systems | Intersegment net revenue and other
Segment Reporting Information
Net revenue	(281)	(263)	(717)	(686)
Printing and Personal Systems | Personal Systems | Operating segments
Segment Reporting Information
Net revenue	8,649	7,733	25,355	23,575
Earnings (loss) from operations	346	238	915	715
Printing and Personal Systems | Printing
Segment Reporting Information
Net revenue	5,514	5,758	17,063	17,708
Printing and Personal Systems | Printing | Intersegment net revenue and other
Segment Reporting Information
Net revenue	(76)	(51)	(176)	(141)
Printing and Personal Systems | Printing | Operating segments
Segment Reporting Information
Net revenue	5,590	5,809	17,239	17,849
Earnings (loss) from operations	$ 1,026	$ 915	$ 3,145	$ 2,852