Earnings (Loss) Per Share Attributable to Navistar International Corporation - Narrative (Details) $ / shares in Units, shares in Millions		3 Months Ended	12 Months Ended
	Sep. 05, 2016 USD ($) $ / shares shares	Oct. 31, 2018 USD ($) $ / shares	Oct. 31, 2018 USD ($) $ / shares shares	Oct. 31, 2017 shares	Oct. 31, 2016 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			9.8	13.9	15.0
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			3.0	3.4	3.4
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 | $ / shares		$ 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 | $ / shares			$ 54.07
Shares related to convertible notes			7.6	7.6	8.0
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
Volkswagen Truck and Bus GmbH [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock Issued During Period, Shares, New Issues	16.2
Stock Issued During Period, Value, New Issues | $	$ 256,000,000
Share Price | $ / shares	$ 15.76
Stock Purchase Agreement, Ownership Percentage Transferred to Acquirer	19.90%
Stock Purchase Agreement, Ownership Percentage Transferred to Acquirer, Pro Forma	16.60%