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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
Feb. 28, 2017
shares
Apr. 30, 2018
USD ($)
$ / shares
shares
Apr. 30, 2017
USD ($)
$ / shares
shares
Apr. 30, 2018
USD ($)
$ / shares
shares
Apr. 30, 2017
USD ($)
$ / shares
shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage   6.75%   6.75%  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares   13.3 14.9 14.2 14.8
Issuance of common stock | $       $ 0 $ 256,000,000
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 | shares   3.4   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 | shares     7.6 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      
Volkswagen Truck and Bus GmbH [Member]          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Stock Issued During Period, Shares, New Issues | shares 16.2        
Issuance of common stock | $     $ 256,000,000    
Share Price | $ / shares     $ 15.76   $ 15.76
Stock Purchase Agreement, Ownership Percentage Transferred to Acquirer 19.90%        
Stock Purchase Agreement, Ownership Percentage Transferred to Acquirer, Pro Forma 16.60%        
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%