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Segment Information (Detail 3) (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
Property, Plant and Equipment, Net [Abstract]      
Property, Plant and Equipment, Net 11,340us-gaap_PropertyPlantAndEquipmentNet 11,463us-gaap_PropertyPlantAndEquipmentNet  
U.S.      
Segment Reporting Information      
Net revenue 38,805us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US		 40,284us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US		 42,140us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
Property, Plant and Equipment, Net [Abstract]      
Property, Plant and Equipment, Net 5,668us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US		 5,546us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US		  
Non-U.S.      
Segment Reporting Information      
Net revenue 72,649us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= hpq_NonUSMember		 72,014us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= hpq_NonUSMember		 78,217us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= hpq_NonUSMember
U.K      
Property, Plant and Equipment, Net [Abstract]      
Property, Plant and Equipment, Net 1,053us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_GB		 1,090us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_GB		  
Other countries      
Property, Plant and Equipment, Net [Abstract]      
Property, Plant and Equipment, Net $ 4,619us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= hpq_OtherCountriesMember		 $ 4,827us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= hpq_OtherCountriesMember