Earnings (Loss) Per Share Attributable to Navistar International Corporation - Narrative (Details) $ / shares in Units, shares in Millions	3 Months Ended	6 Months Ended
Apr. 30, 2020 USD ($) $ / shares	Apr. 30, 2020 shares
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		3.4
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
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
Manufacturing Operations [Member] \| Convertible Subordinated Debt [Member] \| Four Point Five Zero Senior Subordinated Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Interest rate	4.50%	4.50%
Manufacturing Operations [Member] \| Convertible Subordinated Debt [Member] \| Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Interest rate	4.75%	4.75%

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Exercise or strike price stated in the contract for options indexed to the issuer's equity shares.

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