Segment Information (Detail 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Segment Reporting Information
Net Revenue	$ 111,454us-gaap_Revenues	$ 112,298us-gaap_Revenues	$ 120,357us-gaap_Revenues
Earnings from operations	7,185us-gaap_OperatingIncomeLoss	7,131us-gaap_OperatingIncomeLoss	(11,057)us-gaap_OperatingIncomeLoss
Stock-based compensation expense	(560)	(500)	(635)
Amortization of intangible assets	(1,000)us-gaap_AmortizationOfIntangibleAssets	(1,373)us-gaap_AmortizationOfIntangibleAssets	(1,784)us-gaap_AmortizationOfIntangibleAssets
Impairment of goodwill and intangible assets			(18,035)
Restructuring charges	(1,619)us-gaap_RestructuringCharges	(990)us-gaap_RestructuringCharges	(2,266)us-gaap_RestructuringCharges
Acquisition-related charges	(11)	(22)	(45)
Interest and other, net	(628)us-gaap_NonoperatingIncomeExpense	(621)us-gaap_NonoperatingIncomeExpense	(876)us-gaap_NonoperatingIncomeExpense
Earnings (loss) before taxes	6,557	6,510	(11,933)
Assets	103,206us-gaap_Assets	105,676us-gaap_Assets
Enterprise Group
Segment Reporting Information
Net Revenue	26,809	27,045	28,349
Enterprise Services
Segment Reporting Information
Net Revenue	21,297	23,041	25,090
Impairment of goodwill and intangible assets			(8,000)
Software
Segment Reporting Information
Net Revenue	3,607	3,701	3,868
HP Financial Services
Segment Reporting Information
Net Revenue	3,416	3,570	3,784
Corporate Investments
Segment Reporting Information
Net Revenue	302	24	57
Printing and Personal Systems Group \| Personal Systems
Segment Reporting Information
Net Revenue	33,304	31,232	34,892
Printing and Personal Systems Group \| Printing
Segment Reporting Information
Net Revenue	22,719	23,685	24,317
Operating segments
Segment Reporting Information
Net Revenue	115,227	115,891	124,065
Earnings from operations	11,328	10,802	12,495
Operating segments \| Enterprise Group
Segment Reporting Information
Net Revenue	27,814	28,081	29,643
Earnings from operations	4,008	4,259	5,123
Assets	27,236	29,759
Operating segments \| Enterprise Services
Segment Reporting Information
Net Revenue	22,398	24,061	25,993
Earnings from operations	803	679	1,045
Assets	13,472	16,217
Operating segments \| Software
Segment Reporting Information
Net Revenue	3,933	4,021	4,171
Earnings from operations	872	868	836
Assets	11,575	11,940
Operating segments \| HP Financial Services
Segment Reporting Information
Net Revenue	3,498	3,629	3,819
Earnings from operations	389	399	388
Assets	13,529	12,746
Operating segments \| Corporate Investments
Segment Reporting Information
Net Revenue	302	24	58
Earnings from operations	(199)	(316)	(233)
Assets	34	105
Operating segments \| Printing and Personal Systems Group
Segment Reporting Information
Net Revenue	57,282	56,075	60,381
Assets	22,167	22,778
Operating segments \| Printing and Personal Systems Group \| Personal Systems
Segment Reporting Information
Net Revenue	34,303	32,179	35,843
Earnings from operations	1,270	980	1,724
Assets	12,104	11,690
Operating segments \| Printing and Personal Systems Group \| Printing
Segment Reporting Information
Net Revenue	22,979	23,896	24,538
Earnings from operations	4,185	3,933	3,612
Assets	10,063	11,088
Eliminations of inter-segment net revenue and other
Segment Reporting Information
Net Revenue	(3,773)	(3,593)	(3,708)
Eliminations of inter-segment net revenue and other \| Enterprise Group
Segment Reporting Information
Net Revenue	(1,005)	(1,036)	(1,294)
Eliminations of inter-segment net revenue and other \| Enterprise Services
Segment Reporting Information
Net Revenue	(1,101)	(1,020)	(903)
Eliminations of inter-segment net revenue and other \| Software
Segment Reporting Information
Net Revenue	(326)	(320)	(303)
Eliminations of inter-segment net revenue and other \| HP Financial Services
Segment Reporting Information
Net Revenue	(82)	(59)	(35)
Eliminations of inter-segment net revenue and other \| Corporate Investments
Segment Reporting Information
Net Revenue			(1)
Eliminations of inter-segment net revenue and other \| Printing and Personal Systems Group \| Personal Systems
Segment Reporting Information
Net Revenue	(999)	(947)	(951)
Eliminations of inter-segment net revenue and other \| Printing and Personal Systems Group \| Printing
Segment Reporting Information
Net Revenue	(260)	(211)	(221)
Significant Reconciling Items
Segment Reporting Information
Corporate and unallocated costs and eliminations	(953)	(786)	(787)
Stock-based compensation expense	(560)	(500)	(635)
Amortization of intangible assets	(1,000)	(1,373)	(1,784)
Impairment of goodwill and intangible assets			(18,035)
Restructuring charges	(1,619)	(990)	(2,266)
Acquisition-related charges	(11)	(22)	(45)
Interest and other, net	(628)	(621)	(876)
Corporate and unallocated assets
Segment Reporting Information
Assets	$ 15,193	$ 12,131

Amount of reconciling item for corporate and unallocated costs, gains and eliminations.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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