| **Summary of Significant Accounting Policies Consolidated Statement of Operations (Details) (USD $)In Millions, except Per Share data**                 | 3 Months Ended | 9 Months Ended |
|---------------------------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| Selling, general and administrative expenses                                                                                                            | $ 334          | $ 380          | [1] | $ 1,006 | $ 1,075 | [1] |
| Net income                                                                                                                                              | 1,409          | 129            | [1] | 1,503 | 217 | [1] |
| Net income attributable to Navistar International Corporation                                                                                           | 1,400          | 117            | [1] | 1,468 | 179 | [1] |
| Basic earnings per share attributable to Navistar International Corporation                                                                             | $ 19.10        | $ 1.61         | [1] | $ 20.13 | $ 2.49 | [1] |
| Diluted earnings per share attributable to Navistar International Corporation                                                                           | $ 18.24        | $ 1.56         | [1] | $ 19.04 | $ 2.44 | [1] |
| As Previously Reported [Member]                                                                                                                         | Â              | Â              |  | Â | Â |  |
| Selling, general and administrative expenses                                                                                                            | Â              | 360            |  | Â | 1,070 |  |
| Net income                                                                                                                                              | Â              | 149            |  | Â | 222 |  |
| Net income attributable to Navistar International Corporation                                                                                           | Â              | 137            |  | Â | 184 |  |
| Basic earnings per share attributable to Navistar International Corporation                                                                             | Â              | $ 1.89         |  | Â | $ 2.56 |  |
| Diluted earnings per share attributable to Navistar International Corporation                                                                           | Â              | $ 1.83         |  | Â | $ 2.51 |  |
| Revisions for Change in Accounting Principle [Member]                                                                                                   | Â              | Â              |  | Â | Â |  |
| Selling, general and administrative expenses                                                                                                            | Â              | 20             |  | Â | 5 |  |
| Net income                                                                                                                                              | Â              | (20)           |  | Â | (5) |  |
| Net income attributable to Navistar International Corporation                                                                                           | Â              | (20)           |  | Â | (5) |  |
| Basic earnings per share attributable to Navistar International Corporation                                                                             | Â              | $ (0.28)       |  | Â | $ (0.07) |  |
| Diluted earnings per share attributable to Navistar International Corporation                                                                           | Â              | $ (0.27)       |  | Â | $ (0.07) |  |
| As Computed Under the Ratable Method [Member]                                                                                                           | Â              | Â              |  | Â | Â |  |
| Selling, general and administrative expenses                                                                                                            | 338            | Â              |  | 1,028 | Â |  |
| Net income                                                                                                                                              | 1,405          | Â              |  | 1,481 | Â |  |
| Net income attributable to Navistar International Corporation                                                                                           | 1,396          | Â              |  | 1,446 | Â |  |
| Basic earnings per share attributable to Navistar International Corporation                                                                             | $ 19.04        | Â              |  | $ 19.84 | Â |  |
| Diluted earnings per share attributable to Navistar International Corporation                                                                           | $ 18.18        | Â              |  | $ 18.75 | Â |  |
| Effect of Change [Member]                                                                                                                               | Â              | Â              |  | Â | Â |  |
| Selling, general and administrative expenses                                                                                                            | (4)            | Â              |  | (22) | Â |  |
| Net income                                                                                                                                              | 4              | Â              |  | 22 | Â |  |
| Net income attributable to Navistar International Corporation                                                                                           | $ 4            | Â              |  | $ 22 | Â |  |
| Basic earnings per share attributable to Navistar International Corporation                                                                             | $ 0.06         | Â              |  | $ 0.29 | Â |  |
| Diluted earnings per share attributable to Navistar International Corporation                                                                           | $ 0.06         | Â              |  | $ 0.29 | Â |  |
|                                                                                                                                                         |
| [1]Certain amounts have been revised to reflect a retrospective change in accounting principle. See Note 1, Summary of significant accounting policies. |

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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.
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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.
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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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| - Definition
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.
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