Taxes on Earnings (Detail 3) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Income Taxes
Income tax charge to record valuation allowances		$ 214	$ 1,300
Amount of charges recorded for various foreign valuation allowances			297
Income tax charge (benefits) for adjustments to prior year foreign income tax accruals, settlement of tax audit matters, and miscellaneous other items		(146)hpq_PriorYearForeignIncomeTaxAccruals	(26)hpq_PriorYearForeignIncomeTaxAccruals
Income tax charges for adjustments to uncertain tax positions and the settlement of tax audit matters		406
Tax benefit from the retroactive research and development credit		(50)
Tax expense (benefit) associated with miscellaneous prior period items		47
Income tax charges related to items unique to the year	53	471
Income tax benefits, reduced rates for subsidiaries in certain countries	$ 1,200	$ 827	$ 900
Income tax benefits, reduced rates for subsidiaries in certain countries (in dollars per share)	$ 0.61	$ 0.42	$ 0.46

Income tax expense (benefit) related to items unique to the year.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit), computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to foreign valuation allowances.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to reduced rates for subsidiaries in certain countries resulting from certain employment actions and capital investments undertaken by the entity.

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Per share amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to reduced rates for subsidiaries in certain countries resulting from certain employment actions and capital investments undertaken by the entity.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported foreign income tax accruals, settlement of tax audit matters and miscellaneous items.

+ References

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 45

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32123-109318

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit).

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