|**Earnings (Loss) Per Share Attributable to Navistar International Corporation (Tables)** | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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|**Earnings Per Share [Abstract]**                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Schedule of Earnings Per Share Reconciliation [Table Text Block]                          | The following table presents the information used in the calculation of our basic and diluted earnings (loss) per share all attributable to NIC in ourConsolidated Statements of Operations:Three Months Ended April 30,Six Months Ended April 30,(in millions, except per share data)2020201920202019Numerator:Net loss attributable to Navistar International Corporation common stockholders$(38)$(48)$(74)$(37)Denominator:Weighted average shares outstanding:Basic99.799.299.699.2Effect of dilutive securities————Diluted99.799.299.699.2Loss per share attributable to Navistar International Corporation:Basic$(0.38)$(0.48)$(0.74)$(0.37)Diluted(0.38)(0.48)(0.74)(0.37)
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|                                                                                          | Three Months Ended April 30,                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|(in millions, except per share data)                                                      | 2020                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|Numerator:                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Net loss attributable to Navistar International Corporation common stockholders           | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
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|Denominator:                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Weighted average shares outstanding:                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Basic                                                                                     | 99.7                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|Effect of dilutive securities                                                             | —                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|Diluted                                                                                   | 99.7                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
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|Loss per share attributable to Navistar International Corporation:                        |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Basic                                                                                     | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|Diluted                                                                                   | (0.38                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             

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