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Loss Per Share Attributable to Navistar International Corporation - Narrative (Details) (USD $)	3 Months Ended	6 Months Ended			12 Months Ended			3 Months Ended	1 Months Ended
	Apr. 30, 2014	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2014	Oct. 31, 2009
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares of Warrants Unwound	6,523,319nav_SharesofWarrantsUnwound
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		24,800,000	29,900,000	28,500,000
Shares related to warrants					6,400,000nav_SharesRelatedToWarrants	11,300,000nav_SharesRelatedToWarrants	11,300,000nav_SharesRelatedToWarrants
Three Point Zero Percent Senior Subordinated Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares of Warrants Unwound	6,523,319
Class of Warrant or Right, Outstanding					4,800,000			4,800,000
Option Indexed to Issuer's Equity, Shares Expired in Period	8,000,000							3,300,000
Shares related to convertible notes					4,500,000	11,300,000	11,300,000
Three Point Zero Percent Senior Subordinated Convertible Notes [Member] \| Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Debt Instrument, Convertible, Conversion Ratio					19.891
Debt Instrument Convertible Conversion Ratio Basis					1,000
Option Indexed to Issuer's Equity, Strike Price									$ 50.27
Investment Warrants, Exercise Price					60.14
Three Point Zero Percent Senior Subordinated Convertible Notes [Member] \| Call Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Option Indexed to Issuer's Equity, Indexed Shares									11,337,870
Four Point Five Zero Senior Subordinated Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares related to convertible notes					5,700,000	900,000
Four Point Five Zero Senior Subordinated Convertible Notes [Member] \| Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Debt Instrument, Convertible, Conversion Ratio					17.1233
Debt Instrument Convertible Conversion Ratio Basis					1,000
Debt Instrument, Convertible, Conversion Price					58.40			58.40
Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Debt Instrument, Convertible, Conversion Ratio					18.4946
Option Indexed to Issuer's Equity, Strike Price					54.07
Shares related to convertible notes					4,400,000
Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member] \| Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Debt Instrument Convertible Conversion Ratio Basis					1,000