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Earnings (Loss) Per Share Attributable to Navistar International Corporation - Narrative (Details)
$ / shares in Units, shares in Millions
3 Months Ended
Jan. 31, 2020
USD ($)
$ / shares
shares
Jan. 31, 2019
shares
Jul. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage 6.625%    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 9.9    
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 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]      
Debt Instrument, Interest Rate, Stated Percentage     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]      
Debt Instrument, Interest Rate, Stated Percentage     4.75%