Segment Information (Details 2) (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
Earnings (loss) from operations	7,131	(11,057)	9,677
Unallocated costs related to stock-based compensation expense	(500)	(635)	(685)
Amortization of intangible assets	(1,373)	(1,784)	(1,607)
Impairment of goodwill and intangible assets		(18,035)	(885)
Restructuring charges	(990)	(2,266)	(645)
Interest and other, net	(621)	(876)	(695)
Earnings (loss) before taxes	6,510	(11,933)	8,982
Assets	105,676	108,768	129,517
Enterprise Group
Segment Reporting Information
Net revenue	27,303	28,628	30,135
Enterprise Services
Segment Reporting Information
Net revenue	23,041	25,091	25,938
Software
Segment Reporting Information
Net revenue	3,593	3,757	3,128
HP Financial Services
Segment Reporting Information
Net revenue	3,570	3,784	3,568
Corporate Investments
Segment Reporting Information
Net revenue	24	57	154
Printing and Personal Systems Group | Personal Systems
Segment Reporting Information
Net revenue	31,124	34,774	38,448
Printing and Personal Systems Group | Printing
Segment Reporting Information
Net revenue	23,643	24,266	25,874
Operating segments
Segment Reporting Information
Net revenue	115,194	123,537	130,687
Earnings (loss) from operations	10,848	12,495	13,928
Operating segments | Enterprise Group
Segment Reporting Information
Net revenue	28,183	29,779	31,460
Earnings (loss) from operations	4,301	5,194	6,265
Assets	30,858	30,851	32,388
Operating segments | Enterprise Services
Segment Reporting Information
Net revenue	23,520	25,609	26,268
Earnings (loss) from operations	679	1,045	1,972
Assets	15,229	16,383	25,765
Operating segments | Software
Segment Reporting Information
Net revenue	3,913	4,060	3,367
Earnings (loss) from operations	866	827	722
Assets	11,868	12,264	21,028
Operating segments | HP Financial Services
Segment Reporting Information
Net revenue	3,629	3,819	3,596
Earnings (loss) from operations	399	388	348
Assets	12,011	12,924	13,543
Operating segments | Corporate Investments
Segment Reporting Information
Net revenue	24	58	166
Earnings (loss) from operations	(236)	(233)	(1,633)
Assets	123	248	517
Operating segments | Printing and Personal Systems Group
Segment Reporting Information
Net revenue	55,925	60,212	65,830
Assets	22,575	23,921	27,720
Operating segments | Printing and Personal Systems Group | Personal Systems
Segment Reporting Information
Net revenue	32,071	35,725	39,654
Earnings (loss) from operations	949	1,689	2,327
Assets	11,870	12,752	15,781
Operating segments | Printing and Personal Systems Group | Printing
Segment Reporting Information
Net revenue	23,854	24,487	26,176
Earnings (loss) from operations	3,890	3,585	3,927
Assets	10,705	11,169	11,939
Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net revenue	(2,896)	(3,180)	(3,442)
Eliminations of inter-segment net revenue and other | Enterprise Group
Segment Reporting Information
Net revenue	(880)	(1,151)	(1,325)
Eliminations of inter-segment net revenue and other | Enterprise Services
Segment Reporting Information
Net revenue	(479)	(518)	(330)
Eliminations of inter-segment net revenue and other | Software
Segment Reporting Information
Net revenue	(320)	(303)	(239)
Eliminations of inter-segment net revenue and other | HP Financial Services
Segment Reporting Information
Net revenue	(59)	(35)	(28)
Eliminations of inter-segment net revenue and other | Corporate Investments
Segment Reporting Information
Net revenue		(1)	(12)
Eliminations of inter-segment net revenue and other | Printing and Personal Systems Group | Personal Systems
Segment Reporting Information
Net revenue	(947)	(951)	(1,206)
Eliminations of inter-segment net revenue and other | Printing and Personal Systems Group | Printing
Segment Reporting Information
Net revenue	(211)	(221)	(302)
Significant Reconciling Items
Segment Reporting Information
Corporate and unallocated costs and eliminations	(832)	(787)	(314)
Unallocated costs related to stock-based compensation expense	(500)	(635)	(618)
Amortization of intangible assets	(1,373)	(1,784)	(1,607)
Impairment of goodwill and intangible assets		(18,035)	(885)
Restructuring charges	(990)	(2,266)	(645)
Acquisition-related charges	(22)	(45)	(182)
Interest and other, net	(621)	(876)	(695)
Corporate and unallocated assets
Segment Reporting Information
Assets	$ 13,012	$ 12,177	$ 8,556