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Summary of Significant Accounting Policies (Details 2) (Major Customers, Accounts Receivable, USD $)
In Billions, unless otherwise specified
 12 Months Ended
Oct. 31, 2014
item
Oct. 31, 2013
Ten largest distributor    
Concentration Risk    
Number of largest distributor and reseller receivable balances or largest outsourced manufacturer receivable balances 10hpq_ConcentrationRiskReceivablesNumber
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= hpq_TenLargestDistributorMember		  
Concentration of credit risk (as a percent) 20.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= hpq_TenLargestDistributorMember		 21.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= hpq_TenLargestDistributorMember
Three largest outsourced manufacturer    
Concentration Risk    
Number of largest distributor and reseller receivable balances or largest outsourced manufacturer receivable balances 3hpq_ConcentrationRiskReceivablesNumber
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= hpq_ThreeLargestOutsourcedManufacturerMember		  
Concentration of credit risk (as a percent) 90.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= hpq_ThreeLargestOutsourcedManufacturerMember		 82.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= hpq_ThreeLargestOutsourcedManufacturerMember
Supplier receivables 1.0hpq_SupplierReceivablesNetCurrent
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= hpq_ThreeLargestOutsourcedManufacturerMember		 1.0hpq_SupplierReceivablesNetCurrent
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= hpq_ThreeLargestOutsourcedManufacturerMember