| **Earnings Per Share Attributable to Navistar International Corporation** | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
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| **Earnings Per Share [Abstract]**                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| Earnings per share attributable to Navistar International Corporation     | Earnings per share attributable to Navistar International CorporationThe following table shows the information used in the calculation of our basic and diluted earnings per share attributable to Navistar International Corporation as of October 31:  2011 2010 2009(in millions, except per share data)     Numerator:     Income attributable to Navistar International Corporation before extraordinary gain$1,723 $223 $297Extraordinary gain, net of tax— — 23Net income attributable to Navistar International Corporation available to common stockholders$1,723 $223 $320Denominator:     Weighted average shares outstanding:     Basic72.8 71.7 71.0Effect of dilutive securities3.3 1.5 0.8Diluted76.1 73.2 71.8      Basic earnings per share:     Income attributable to Navistar International Corporation before extraordinary gain$23.66 $3.11 $4.18Extraordinary gain, net of tax— — 0.33Net income attributable to Navistar International Corporation$23.66 $3.11 $4.51      Diluted earnings per share     Income attributable to Navistar International Corporation before extraordinary gain$22.64 $3.05 $4.14Extraordinary gain, net of tax— — 0.32Net income attributable to Navistar International Corporation$22.64 $3.05 $4.46The conversion rate on our Convertible Notes is 19.891 shares of common stock per $1,000 principal amount of Convertible Notes, equivalent to an initial conversion price of $50.27 per share of common stock. In connection with the sale of the Convertible Notes, we sold warrants to various counterparties to purchase shares of our common stock from us at an exercise price of $60.14 per share. The Convertible Notes and warrants are anti-dilutive when calculating diluted earnings per share when our average stock price is less than $50.27 and $60.14, respectively.We also purchased call options in connection with the sale of the Convertible Notes, covering 11.3 million shares at an exercise price of $50.27 per share, which are intended to minimize share dilution associated with the Convertible Notes; however under accounting guidance, these call options cannot be utilized to offset the dilution of the Convertible Notes for determining diluted earnings per share as they are anti-dilutive.The computation of diluted earnings per share also excludes outstanding options and other common stock equivalents in periods where inclusion of such potential common stock instruments would be anti-dilutive in the periods presented.The aggregate shares not included in the computation of earnings per share, as they would be anti-dilutive, were 0.9 million, 11.5 million and 22.9 million for the years ended October 31, 2011, 2010 and 2009, respectively. In addition, the computation of earnings per share for the year ended October 31, 2011 did not include any impact of the forward contract related to the ASR program as it would have been anti-dilutive. The 11.5 million shares not included in the 2010 computation include 11.3 million shares related to warrants which were anti-dilutive as our average stock price was less than the exercise price on the warrants for the year ended October 31, 2010. The 22.9 million shares not included in the 2009 computation include 11.3 million shares related to our Convertible Notes and 11.3 million shares related to warrants which were both anti-dilutive as our average stock price was less than both the conversion price of the Convertible Notes and the exercise price of the warrants for the year ended October 31, 2009. |

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The entire disclosure for earnings per share.
+ References
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