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Stock-based Compensation Plans - Schedule of Valuation Assumptions (Details) (USD $)
12 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2012
Cash-settled Performance-based Stock Unit [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk Free Interest Rate     0.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= nav_CashsettledPerformancebasedStockUnitMember
Expected Dividend Rate     0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= nav_CashsettledPerformancebasedStockUnitMember
Expected Volatility Rate     52.30%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= nav_CashsettledPerformancebasedStockUnitMember
Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk Free Interest Rate 1.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
0.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
0.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Expected Dividend Rate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Expected Volatility Rate 45.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
54.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
55.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Expected Term 4 years 10 months 18 days 5 years 1 month 6 days 4 years 9 months 18 days
Black Scholes [Member] | Performance-based Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk Free Interest Rate 1.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= nav_PerformancebasedStockOptionsMember
/ us-gaap_ValuationTechniqueAxis
= nav_BlackScholesMember
0.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= nav_PerformancebasedStockOptionsMember
/ us-gaap_ValuationTechniqueAxis
= nav_BlackScholesMember
 
Expected Dividend Rate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= nav_PerformancebasedStockOptionsMember
/ us-gaap_ValuationTechniqueAxis
= nav_BlackScholesMember
0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= nav_PerformancebasedStockOptionsMember
/ us-gaap_ValuationTechniqueAxis
= nav_BlackScholesMember
 
Expected Volatility Rate 45.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= nav_PerformancebasedStockOptionsMember
/ us-gaap_ValuationTechniqueAxis
= nav_BlackScholesMember
54.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= nav_PerformancebasedStockOptionsMember
/ us-gaap_ValuationTechniqueAxis
= nav_BlackScholesMember
 
Expected Term 4 years 10 months 15 days 5 years 1 month 6 days  
Monte Carlo [Member] | Performance-based Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk Free Interest Rate   0.90%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= nav_PerformancebasedStockOptionsMember
/ us-gaap_ValuationTechniqueAxis
= nav_MonteCarloMember
 
Expected Dividend Rate   0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= nav_PerformancebasedStockOptionsMember
/ us-gaap_ValuationTechniqueAxis
= nav_MonteCarloMember
 
Expected Volatility Rate   55.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= nav_PerformancebasedStockOptionsMember
/ us-gaap_ValuationTechniqueAxis
= nav_MonteCarloMember
 
Expected Term   5 years 0 months 1 day  
Fair Value Assumptions, Exercise Price   12,410,000us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_AwardTypeAxis
= nav_PerformancebasedStockOptionsMember
/ us-gaap_ValuationTechniqueAxis
= nav_MonteCarloMember