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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, 2019
USD ($)
$ / shares
shares
Apr. 30, 2019
$ / shares
shares
Apr. 30, 2018
shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 13.3   14.0
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   3.4 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
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% 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% 4.75%