Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014 segment	Apr. 30, 2013
Segment Information
Number of reportable segments			7
Segment Reporting Information
Net revenue	$ 27,309	$ 27,582	$ 55,463	$ 55,941
Earnings (loss) from operations	1,822	1,601	3,819	3,353
Intersegment net revenue and other
Segment Reporting Information
Net revenue	(904)	(907)	(1,757)	(1,624)
Operating segments
Segment Reporting Information
Net revenue	28,213	28,489	57,220	57,565
Earnings (loss) from operations	2,722	2,646	5,410	5,175
Enterprise Group
Segment Reporting Information
Net revenue	6,395	6,526	13,186	13,274
Enterprise Group | Intersegment net revenue and other
Segment Reporting Information
Net revenue	(262)	(268)	(464)	(468)
Enterprise Group | Operating segments
Segment Reporting Information
Net revenue	6,657	6,794	13,650	13,742
Earnings (loss) from operations	961	1,074	1,967	2,144
Enterprise Services
Segment Reporting Information
Net revenue	5,443	5,889	10,726	11,681
Enterprise Services | Intersegment net revenue and other
Segment Reporting Information
Net revenue	(259)	(244)	(571)	(490)
Enterprise Services | Operating segments
Segment Reporting Information
Net revenue	5,702	6,133	11,297	12,171
Earnings (loss) from operations	144	156	201	232
Software
Segment Reporting Information
Net revenue	891	894	1,737	1,791
Software | Intersegment net revenue and other
Segment Reporting Information
Net revenue	(80)	(73)	(150)	(127)
Software | Operating segments
Segment Reporting Information
Net revenue	971	967	1,887	1,918
Earnings (loss) from operations	186	180	331	335
HP Financial Services
Segment Reporting Information
Net revenue	847	866	1,701	1,812
HP Financial Services | Intersegment net revenue and other
Segment Reporting Information
Net revenue	(20)	(15)	(36)	(26)
HP Financial Services | Operating segments
Segment Reporting Information
Net revenue	867	881	1,737	1,838
Earnings (loss) from operations	99	97	200	198
Corporate Investments
Segment Reporting Information
Net revenue	6	10	294	14
Corporate Investments | Operating segments
Segment Reporting Information
Net revenue	6	10	294	14
Earnings (loss) from operations	(98)	(75)	23	(148)
Printing and Personal Systems | Operating segments
Segment Reporting Information
Net revenue	14,010	13,704	28,355	27,882
Printing and Personal Systems | Personal Systems
Segment Reporting Information
Net revenue	7,960	7,351	16,270	15,419
Printing and Personal Systems | Personal Systems | Intersegment net revenue and other
Segment Reporting Information
Net revenue	(216)	(259)	(436)	(423)
Printing and Personal Systems | Personal Systems | Operating segments
Segment Reporting Information
Net revenue	8,176	7,610	16,706	15,842
Earnings (loss) from operations	290	244	569	477
Printing and Personal Systems | Printing
Segment Reporting Information
Net revenue	5,767	6,046	11,549	11,950
Printing and Personal Systems | Printing | Intersegment net revenue and other
Segment Reporting Information
Net revenue	(67)	(48)	(100)	(90)
Printing and Personal Systems | Printing | Operating segments
Segment Reporting Information
Net revenue	5,834	6,094	11,649	12,040
Earnings (loss) from operations	$ 1,140	$ 970	$ 2,119	$ 1,937