Amount of additional borrowing capacity authorized for subsidiaries in excess of maximum amount.

No definition available.

Name:	hpq_LineOfCreditFacilityAdditionalAuthorizationForSubsidiariesInExcessOfMaximumBorrowingCapacity
Namespace Prefix:	hpq_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the number of commercial paper programs maintained by the entity.

+ References

No definition available.

+ Details

Name:	hpq_NumberOfCommercialPaperProgramsMaintained
Namespace Prefix:	hpq_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of independent publicly traded companies.

+ References

No definition available.

+ Details

Name:	hpq_NumberOfIndependentCompanies
Namespace Prefix:	hpq_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=hpq_CreditFacilityExpiringMarch2017Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_EUR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_GBP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=hpq_CreditFacilityExpiringFebruary2015Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=hpq_TermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_FederalFundsEffectiveSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_CommercialPaperMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=hpq_UnitedStatesCommercialPaperProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=hpq_EuroCommercialPaperProgramMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	dei_LegalEntityAxis=hpq_HewlettPackardInternationalBankPLCMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_CreditFacilityAxis=hpq_EuroCommercialPaperCertificateOfDepositProgrammeMember
Namespace Prefix:
Data Type:	na
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Borrowings (Details 3) $ in Millions		9 Months Ended
Borrowings (Details 3) $ in Millions	Apr. 30, 2015 USD ($)	Jul. 31, 2015 USD ($) item	May. 15, 2015 USD ($)	Sep. 30, 2012 USD ($)
Credit facilities
Debt instruments
Amount available under credit facility		$ 7,500
Available borrowing resources, other than 2012 Shelf Registration		2,307
Credit facility expiring March 2017
Debt instruments
Amount available under credit facility		$ 3,000
Term of credit facility		5 years
Credit facility expiring March 2017 \| Euro
Debt instruments
Maximum borrowing capacity under credit facility				$ 2,200
Credit facility expiring March 2017 \| GBP
Debt instruments
Maximum borrowing capacity under credit facility				300
Credit facility expired February 2015
Debt instruments
Amount available under credit facility		$ 4,500
Term of credit facility		5 years
Term loan facility
Debt instruments
Maximum borrowing capacity under credit facility	$ 5,000
Amount available under credit facility		$ 1,500
Number of independent publicly-traded companies \| item		2
Amount outstanding			$ 3,500
Term loan facility \| LIBOR
Debt instruments
Spread on reference interest rate (as a percent)	1.00%
Term loan facility \| LIBOR \| Minimum
Debt instruments
Spread on reference interest rate (as a percent)	1.00%
Term loan facility \| LIBOR \| Maximum
Debt instruments
Spread on reference interest rate (as a percent)	1.125%
Term loan facility \| Federal funds effective rate
Debt instruments
Spread on reference interest rate (as a percent)	0.50%
Term loan facility \| Alternate base rate \| Minimum
Debt instruments
Spread on reference interest rate (as a percent)	0.00%
Term loan facility \| Alternate base rate \| Maximum
Debt instruments
Spread on reference interest rate (as a percent)	0.125%
Commercial paper
Debt instruments
Number of commercial paper programs \| item		2
Maximum borrowing capacity under credit facility		$ 16,000
Amount of additional commercial paper authorization for subsidiaries		1,000
Available borrowing resources, other than 2012 Shelf Registration		12,390
Commercial paper \| U.S. program
Debt instruments
Maximum borrowing capacity under credit facility		16,000
Commercial paper \| Euro program
Debt instruments
Maximum borrowing capacity under credit facility				$ 3,000
Hewlett-Packard International Bank PLC \| Commercial paper \| Euro Commercial Paper/Certificate of Deposit Programme
Debt instruments
Maximum borrowing capacity under credit facility		$ 500