| **Segment reporting (Details) (USD $)In Millions, unless otherwise specified**                                                                                                                                                                                                                                                                                                                                          | 3 Months Ended | 6 Months Ended |         |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|---------|
||
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                                                                                                                                                                          |           |                |    |  |   |  |   |  |   |  |
| Number Of Segments                                                                                                                                                                                                                                                                                                                                                                                                      | 4              |                |    |  | 4 |  |   |  |   |  |
| External sales and revenues, net                                                                                                                                                                                                                                                                                                                                                                                        | $ 3,298        |                | $ 3,355 |  | $ 6,350 |  | $ 6,098 |  |   |  |
| Intersegment sales and revenues                                                                                                                                                                                                                                                                                                                                                                                         | 0              |                | 0       |  | 0 |  | 0 |  |   |  |
| Sales and revenues, net                                                                                                                                                                                                                                                                                                                                                                                                 | 3,298          |                | 3,355   |  | 6,350 |  | 6,098 |  |   |  |
| Net income (loss) attributable to Navistar International Corporation                                                                                                                                                                                                                                                                                                                                                    | (172)          |                | 74      |  | (325) |  | 68 |  |   |  |
| Income tax benefit (expense)                                                                                                                                                                                                                                                                                                                                                                                            | 133            |                | (5)     |  | 214 |  | (5) |  |   |  |
| Segment profit (loss)                                                                                                                                                                                                                                                                                                                                                                                                   | (305)          |                | 79      |  | (539) |  | 73 |  |   |  |
| Depreciation and amortization                                                                                                                                                                                                                                                                                                                                                                                           | 82             |                | 81      |  | 160 |  | 161 |  |   |  |
| Interest expense                                                                                                                                                                                                                                                                                                                                                                                                        | 62             |                | 62      |  | 123 |  | 125 |  |   |  |
| Equity in loss of non-consolidated affiliates                                                                                                                                                                                                                                                                                                                                                                           | (4)            |                | (16)    |  | (11) |  | (33) |  |   |  |
| Capital expenditures                                                                                                                                                                                                                                                                                                                                                                                                    | 73             | [1]            | 90      | [1] | 176 | [1] | 185 | [1] |   |  |
| Segment assets                                                                                                                                                                                                                                                                                                                                                                                                          | 11,384         |                |    |  | 11,384 |  |   |  | 12,291 |  |
| Truck [Member]                                                                                                                                                                                                                                                                                                                                                                                                          |           |                |    |  |   |  |   |  |   |  |
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                                                                                                                                                                          |           |                |    |  |   |  |   |  |   |  |
| External sales and revenues, net                                                                                                                                                                                                                                                                                                                                                                                        | 2,353          | [2]            | 2,262   | [2] | 4,507 | [2] | 4,053 | [2] |   |  |
| Intersegment sales and revenues                                                                                                                                                                                                                                                                                                                                                                                         | 2              | [2]            | 9       | [2] | 13 | [2] | 18 | [2] |   |  |
| Sales and revenues, net                                                                                                                                                                                                                                                                                                                                                                                                 | 2,355          | [2]            | 2,271   | [2] | 4,520 | [2] | 4,071 | [2] |   |  |
| Net income (loss) attributable to Navistar International Corporation                                                                                                                                                                                                                                                                                                                                                    | (89)           | [2]            | 92      | [2] | (130) | [2] | 124 | [2] |   |  |
| Income tax benefit (expense)                                                                                                                                                                                                                                                                                                                                                                                            | 0              | [2]            | 0       | [2] | 0 | [2] | 0 | [2] |   |  |
| Segment profit (loss)                                                                                                                                                                                                                                                                                                                                                                                                   | (89)           | [2]            | 92      | [2] | (130) | [2] | 124 | [2] |   |  |
| Depreciation and amortization                                                                                                                                                                                                                                                                                                                                                                                           | 35             | [2]            | 38      | [2] | 69 | [2] | 75 | [2] |   |  |
| Interest expense                                                                                                                                                                                                                                                                                                                                                                                                        | 0              | [2]            | 0       | [2] | 0 | [2] | 0 | [2] |   |  |
| Equity in loss of non-consolidated affiliates                                                                                                                                                                                                                                                                                                                                                                           | (6)            | [2]            | (17)    | [2] | (15) | [2] | (35) | [2] |   |  |
| Capital expenditures                                                                                                                                                                                                                                                                                                                                                                                                    | 16             | [1],[2]        | 22      | [1],[2] | 32 | [1],[2] | 38 | [1],[2] |   |  |
| Segment assets                                                                                                                                                                                                                                                                                                                                                                                                          | 2,685          | [2]            |    |  | 2,685 | [2] |   |  | 2,771 | [2] |
| Engine [Member]                                                                                                                                                                                                                                                                                                                                                                                                         |           |                |    |  |   |  |   |  |   |  |
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                                                                                                                                                                          |           |                |    |  |   |  |   |  |   |  |
| External sales and revenues, net                                                                                                                                                                                                                                                                                                                                                                                        | 440            |                | 524     |  | 860 |  | 980 |  |   |  |
| Intersegment sales and revenues                                                                                                                                                                                                                                                                                                                                                                                         | 454            |                | 431     |  | 893 |  | 758 |  |   |  |
| Sales and revenues, net                                                                                                                                                                                                                                                                                                                                                                                                 | 894            |                | 955     |  | 1,753 |  | 1,738 |  |   |  |
| Net income (loss) attributable to Navistar International Corporation                                                                                                                                                                                                                                                                                                                                                    | (108)          |                | 2       |  | (228) |  | (6) |  |   |  |
| Income tax benefit (expense)                                                                                                                                                                                                                                                                                                                                                                                            | 0              |                | 0       |  | 0 |  | 0 |  |   |  |
| Segment profit (loss)                                                                                                                                                                                                                                                                                                                                                                                                   | (108)          |                | 2       |  | (228) |  | (6) |  |   |  |
| Depreciation and amortization                                                                                                                                                                                                                                                                                                                                                                                           | 30             |                | 30      |  | 59 |  | 59 |  |   |  |
| Interest expense                                                                                                                                                                                                                                                                                                                                                                                                        | 0              |                | 0       |  | 0 |  | 0 |  |   |  |
| Equity in loss of non-consolidated affiliates                                                                                                                                                                                                                                                                                                                                                                           | 0              |                | (2)     |  | 1 |  | (2) |  |   |  |
| Capital expenditures                                                                                                                                                                                                                                                                                                                                                                                                    | 36             | [1]            | 52      | [1] | 76 | [1] | 84 | [1] |   |  |
| Segment assets                                                                                                                                                                                                                                                                                                                                                                                                          | 1,823          |                |    |  | 1,823 |  |   |  | 1,849 |  |
| Parts [Member]                                                                                                                                                                                                                                                                                                                                                                                                          |           |                |    |  |   |  |   |  |   |  |
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                                                                                                                                                                          |           |                |    |  |   |  |   |  |   |  |
| Number Of Regional Parts Distribution Centers                                                                                                                                                                                                                                                                                                                                                                           | 11             |                |    |  | 11 |  |   |  |   |  |
| External sales and revenues, net                                                                                                                                                                                                                                                                                                                                                                                        | 462            |                | 512     |  | 896 |  | 958 |  |   |  |
| Intersegment sales and revenues                                                                                                                                                                                                                                                                                                                                                                                         | 34             |                | 50      |  | 69 |  | 99 |  |   |  |
| Sales and revenues, net                                                                                                                                                                                                                                                                                                                                                                                                 | 496            |                | 562     |  | 965 |  | 1,057 |  |   |  |
| Net income (loss) attributable to Navistar International Corporation                                                                                                                                                                                                                                                                                                                                                    | 41             |                | 74      |  | 91 |  | 130 |  |   |  |
| Income tax benefit (expense)                                                                                                                                                                                                                                                                                                                                                                                            | 0              |                | 0       |  | 0 |  | 0 |  |   |  |
| Segment profit (loss)                                                                                                                                                                                                                                                                                                                                                                                                   | 41             |                | 74      |  | 91 |  | 130 |  |   |  |
| Depreciation and amortization                                                                                                                                                                                                                                                                                                                                                                                           | 4              |                | 3       |  | 6 |  | 5 |  |   |  |
| Interest expense                                                                                                                                                                                                                                                                                                                                                                                                        | 0              |                | 0       |  | 0 |  | 0 |  |   |  |
| Equity in loss of non-consolidated affiliates                                                                                                                                                                                                                                                                                                                                                                           | 2              |                | 3       |  | 3 |  | 4 |  |   |  |
| Capital expenditures                                                                                                                                                                                                                                                                                                                                                                                                    | 5              | [1]            | 3       | [1] | 12 | [1] | 4 | [1] |   |  |
| Segment assets                                                                                                                                                                                                                                                                                                                                                                                                          | 698            |                |    |  | 698 |  |   |  | 700 |  |
| Financial Services [Member]                                                                                                                                                                                                                                                                                                                                                                                             |           |                |    |  |   |  |   |  |   |  |
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                                                                                                                                                                          |           |                |    |  |   |  |   |  |   |  |
| External sales and revenues, net                                                                                                                                                                                                                                                                                                                                                                                        | 43             | [3]            | 57      | [3] | 87 | [3] | 107 | [3] |   |  |
| Intersegment sales and revenues                                                                                                                                                                                                                                                                                                                                                                                         | 24             | [3]            | 26      | [3] | 48 | [3] | 49 | [3] |   |  |
| Sales and revenues, net                                                                                                                                                                                                                                                                                                                                                                                                 | 67             | [3]            | 83      | [3] | 135 | [3] | 156 | [3] |   |  |
| Net income (loss) attributable to Navistar International Corporation                                                                                                                                                                                                                                                                                                                                                    | 26             | [3]            | 40      | [3] | 53 | [3] | 72 | [3] |   |  |
| Income tax benefit (expense)                                                                                                                                                                                                                                                                                                                                                                                            | 0              | [3]            | 0       | [3] | 0 | [3] | 0 | [3] |   |  |
| Segment profit (loss)                                                                                                                                                                                                                                                                                                                                                                                                   | 26             | [3]            | 40      | [3] | 53 | [3] | 72 | [3] |   |  |
| Depreciation and amortization                                                                                                                                                                                                                                                                                                                                                                                           | 8              | [3]            | 6       | [3] | 16 | [3] | 13 | [3] |   |  |
| Interest expense                                                                                                                                                                                                                                                                                                                                                                                                        | 22             | [3]            | 26      | [3] | 47 | [3] | 56 | [3] |   |  |
| Equity in loss of non-consolidated affiliates                                                                                                                                                                                                                                                                                                                                                                           | 0              | [3]            | 0       | [3] | 0 | [3] | 0 | [3] |   |  |
| Capital expenditures                                                                                                                                                                                                                                                                                                                                                                                                    | 1              | [1],[3]        | 0       | [1],[3] | 2 | [1],[3] | 0 | [1],[3] |   |  |
| Segment assets                                                                                                                                                                                                                                                                                                                                                                                                          | 3,043          | [3]            |    |  | 3,043 | [3] |   |  | 3,580 | [3] |
| Interest revenues                                                                                                                                                                                                                                                                                                                                                                                                       | 66             |                | 82      |  | 133 |  | 153 |  |   |  |
| Corporate and Eliminations [Member]                                                                                                                                                                                                                                                                                                                                                                                     |           |                |    |  |   |  |   |  |   |  |
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                                                                                                                                                                          |           |                |    |  |   |  |   |  |   |  |
| External sales and revenues, net                                                                                                                                                                                                                                                                                                                                                                                        | 0              |                | 0       |  | 0 |  | 0 |  |   |  |
| Intersegment sales and revenues                                                                                                                                                                                                                                                                                                                                                                                         | (514)          |                | (516)   |  | (1,023) |  | (924) |  |   |  |
| Sales and revenues, net                                                                                                                                                                                                                                                                                                                                                                                                 | (514)          |                | (516)   |  | (1,023) |  | (924) |  |   |  |
| Net income (loss) attributable to Navistar International Corporation                                                                                                                                                                                                                                                                                                                                                    | (42)           |                | (134)   |  | (111) |  | (252) |  |   |  |
| Income tax benefit (expense)                                                                                                                                                                                                                                                                                                                                                                                            | 133            |                | (5)     |  | 214 |  | (5) |  |   |  |
| Segment profit (loss)                                                                                                                                                                                                                                                                                                                                                                                                   | (175)          |                | (129)   |  | (325) |  | (247) |  |   |  |
| Depreciation and amortization                                                                                                                                                                                                                                                                                                                                                                                           | 5              |                | 4       |  | 10 |  | 9 |  |   |  |
| Interest expense                                                                                                                                                                                                                                                                                                                                                                                                        | 40             |                | 36      |  | 76 |  | 69 |  |   |  |
| Equity in loss of non-consolidated affiliates                                                                                                                                                                                                                                                                                                                                                                           | 0              |                | 0       |  | 0 |  | 0 |  |   |  |
| Capital expenditures                                                                                                                                                                                                                                                                                                                                                                                                    | 15             | [1]            | 13      | [1] | 54 | [1] | 59 | [1] |   |  |
| Segment assets                                                                                                                                                                                                                                                                                                                                                                                                          | $ 3,135        |                |    |  | $ 3,135 |  |   |  | $ 3,391 |  |
|                                                                                                                                                                                                                                                                                                                                                                                                                         |
| [1]Exclusive of purchases of equipment leased to others.[2]See Note 2, Restructurings and Impairments, for further discussion[3])Total sales and revenues in the Financial Services segment include interest revenues of $66 million and $133 million for the three and six months ended April 30, 2012, respectively, and $82 million and $153 million for the three and six months ended April 30, 2011, respectively |

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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number Of Regional Parts Distribution Centers
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Number Of Segments
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| - Definition
Amount of profit or loss recognized by the reportable segment.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.
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| - Definition
This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.
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| - Definition
The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.
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| - Definition
The cost of borrowed funds accounted for as interest that was charged against earnings during the period.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Income derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or forbearance of money.
+ References
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| - Definition
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 cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.
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| - Definition
Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.
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| - Definition
Amount of revenue from external customers for the reportable segment. Such disclosure is presented if the amount is: (a) included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.
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| - Definition
Amount of revenue from transactions with other operating segments of the same entity.
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