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Segment Reporting - Summary of Segment Assets (Details) (USD $)
In Millions, unless otherwise specified
Oct. 31, 2014
Oct. 31, 2013
Segment Reporting Information [Line Items]    
Segment Assets $ 7,443us-gaap_Assets $ 8,315us-gaap_Assets
North America Truck [Member]    
Segment Reporting Information [Line Items]    
Segment Assets 2,145us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= nav_NorthAmericaTruckMember		 2,250us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= nav_NorthAmericaTruckMember
North America Parts [Member]    
Segment Reporting Information [Line Items]    
Segment Assets 682us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= nav_NorthAmericaPartsMember		 716us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= nav_NorthAmericaPartsMember
Global Operations [Member]    
Segment Reporting Information [Line Items]    
Segment Assets 749us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= nav_GlobalOperationsMember		 1,162us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= nav_GlobalOperationsMember
Financial Services Operations [Member]    
Segment Reporting Information [Line Items]    
Segment Assets 2,598us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= nav_FinancialServicesOperationsMember		 2,355us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= nav_FinancialServicesOperationsMember
Corporate And Eliminations [Member]    
Segment Reporting Information [Line Items]    
Segment Assets $ 1,269us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= nav_CorporateAndEliminationsMember		 $ 1,832us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= nav_CorporateAndEliminationsMember