| **Condensed Consolidating Guarantor and Non-Guarantor - Statement of Operations (Details) (USD $)In Millions, unless otherwise specified** | 3 Months Ended | 12 Months Ended |
|--------------------------------------------------------------------------------------------------------------------------------------------|----------------|-----------------|
||
| Sales and revenues, net                                                                                                                    | $ 3,279        | $ 3,319         | $ 3,298 | $ 3,052 | $ 4,323 | $ 3,537 | $ 3,355 | $ 2,743 | $ 12,948 | $ 13,958 | $ 12,145 |
| Costs of products sold                                                                                                                     |           |            |   |   |   |   |   |   | 11,670 | 11,262 | 9,741 |
| Restructuring charges                                                                                                                      |           |            |   |   |   |   |   |   | 108 | 92 | (15) |
| Impairment of property and equipment and intangible assets                                                                                 |           |            |   |   |   |   |   |   | 44 | 64 |   |
| All other operating expenses                                                                                                               |           |            |   |   |   |   |   |   | 2,279 | 2,149 | 2,079 |
| Total Costs and Expenses                                                                                                                   |           |            |   |   |   |   |   |   | 14,101 | 13,567 | 11,805 |
| Equity in income (loss) of non-consolidated affiliates                                                                                     |           |            |   |   |   |   |   |   | (29) | (71) | (50) |
| Income (loss) before income taxes                                                                                                          |           |            |   |   |   |   |   |   | (1,182) | 320 | 290 |
| Income tax benefit (expense)                                                                                                               |           |            |   |   |   |   |   |   | (1,780) | 1,458 | (23) |
| Net income (loss)                                                                                                                          | (2,756)        | 96              | (162) | (140) | 275 | 1,409 | 88 | 6 | (2,962) | 1,778 | 267 |
| Less: Net income attributable to non-controlling interests                                                                                 | 13             | 12              | 10 | 13 | 20 | 9 | 14 | 12 | 48 | 55 | 44 |
| Net income (loss) attributable to Navistar International Corporation                                                                       | (2,769)        | 84              | (172) | (153) | 255 | 1,400 | 74 | (6) | (3,010) | 1,723 | 223 |
| Parent Company [Domain]                                                                                                                    |           |            |   |   |   |   |   |   |   |   |   |
| Sales and revenues, net                                                                                                                    |           |            |   |   |   |   |   |   | 0 | 0 | 0 |
| Costs of products sold                                                                                                                     |           |            |   |   |   |   |   |   | 0 | 0 | (1) |
| Restructuring charges                                                                                                                      |           |            |   |   |   |   |   |   | 0 | 0 | 0 |
| Impairment of property and equipment and intangible assets                                                                                 |           |            |   |   |   |   |   |   | 0 | 0 |   |
| All other operating expenses                                                                                                               |           |            |   |   |   |   |   |   | (249) | 79 | 61 |
| Total Costs and Expenses                                                                                                                   |           |            |   |   |   |   |   |   | (249) | 79 | 60 |
| Equity in income (loss) of non-consolidated affiliates                                                                                     |           |            |   |   |   |   |   |   | (3,258) | 1,759 | 283 |
| Income (loss) before income taxes                                                                                                          |           |            |   |   |   |   |   |   | (3,009) | 1,680 | 223 |
| Income tax benefit (expense)                                                                                                               |           |            |   |   |   |   |   |   | (1) | 43 | 0 |
| Net income (loss)                                                                                                                          |           |            |   |   |   |   |   |   | (3,010) | 1,723 | 223 |
| Less: Net income attributable to non-controlling interests                                                                                 |           |            |   |   |   |   |   |   | 0 | 0 | 0 |
| Net income (loss) attributable to Navistar International Corporation                                                                       |           |            |   |   |   |   |   |   | (3,010) | 1,723 | 223 |
| Guarantor Subsidiaries [Domain]                                                                                                            |           |            |   |   |   |   |   |   |   |   |   |
| Sales and revenues, net                                                                                                                    |           |            |   |   |   |   |   |   | 7,924 | 8,319 | 6,751 |
| Costs of products sold                                                                                                                     |           |            |   |   |   |   |   |   | 8,188 | 7,775 | 6,303 |
| Restructuring charges                                                                                                                      |           |            |   |   |   |   |   |   | 86 | 33 | (13) |
| Impairment of property and equipment and intangible assets                                                                                 |           |            |   |   |   |   |   |   | 2 | 0 |   |
| All other operating expenses                                                                                                               |           |            |   |   |   |   |   |   | 1,297 | 1,263 | 1,349 |
| Total Costs and Expenses                                                                                                                   |           |            |   |   |   |   |   |   | 9,573 | 9,071 | 7,639 |
| Equity in income (loss) of non-consolidated affiliates                                                                                     |           |            |   |   |   |   |   |   | 536 | 462 | 895 |
| Income (loss) before income taxes                                                                                                          |           |            |   |   |   |   |   |   | (1,113) | (290) | 7 |
| Income tax benefit (expense)                                                                                                               |           |            |   |   |   |   |   |   | (1,987) | 1,937 | 55 |
| Net income (loss)                                                                                                                          |           |            |   |   |   |   |   |   | (3,100) | 1,647 | 62 |
| Less: Net income attributable to non-controlling interests                                                                                 |           |            |   |   |   |   |   |   | 0 | 0 | 0 |
| Net income (loss) attributable to Navistar International Corporation                                                                       |           |            |   |   |   |   |   |   | (3,100) | 1,647 | 62 |
| Non-Guarantor Subsidiaries [Domain]                                                                                                        |           |            |   |   |   |   |   |   |   |   |   |
| Sales and revenues, net                                                                                                                    |           |            |   |   |   |   |   |   | 11,666 | 13,202 | 11,278 |
| Costs of products sold                                                                                                                     |           |            |   |   |   |   |   |   | 10,067 | 10,974 | 9,245 |
| Restructuring charges                                                                                                                      |           |            |   |   |   |   |   |   | 22 | 59 | (2) |
| Impairment of property and equipment and intangible assets                                                                                 |           |            |   |   |   |   |   |   | 42 | 64 |   |
| All other operating expenses                                                                                                               |           |            |   |   |   |   |   |   | 994 | 902 | 763 |
| Total Costs and Expenses                                                                                                                   |           |            |   |   |   |   |   |   | 11,125 | 11,999 | 10,006 |
| Equity in income (loss) of non-consolidated affiliates                                                                                     |           |            |   |   |   |   |   |   | (34) | (37) | (17) |
| Income (loss) before income taxes                                                                                                          |           |            |   |   |   |   |   |   | 507 | 1,166 | 1,255 |
| Income tax benefit (expense)                                                                                                               |           |            |   |   |   |   |   |   | 209 | (511) | (78) |
| Net income (loss)                                                                                                                          |           |            |   |   |   |   |   |   | 716 | 655 | 1,177 |
| Less: Net income attributable to non-controlling interests                                                                                 |           |            |   |   |   |   |   |   | 48 | 55 | 44 |
| Net income (loss) attributable to Navistar International Corporation                                                                       |           |            |   |   |   |   |   |   | 668 | 600 | 1,133 |
| Consolidation, Eliminations [Domain]                                                                                                       |           |            |   |   |   |   |   |   |   |   |   |
| Sales and revenues, net                                                                                                                    |           |            |   |   |   |   |   |   | (6,642) | (7,563) | (5,884) |
| Costs of products sold                                                                                                                     |           |            |   |   |   |   |   |   | (6,585) | (7,487) | (5,806) |
| Restructuring charges                                                                                                                      |           |            |   |   |   |   |   |   | 0 | 0 | 0 |
| Impairment of property and equipment and intangible assets                                                                                 |           |            |   |   |   |   |   |   | 0 | 0 |   |
| All other operating expenses                                                                                                               |           |            |   |   |   |   |   |   | 237 | (95) | (94) |
| Total Costs and Expenses                                                                                                                   |           |            |   |   |   |   |   |   | (6,348) | (7,582) | (5,900) |
| Equity in income (loss) of non-consolidated affiliates                                                                                     |           |            |   |   |   |   |   |   | 2,727 | (2,255) | (1,211) |
| Income (loss) before income taxes                                                                                                          |           |            |   |   |   |   |   |   | 2,433 | (2,236) | (1,195) |
| Income tax benefit (expense)                                                                                                               |           |            |   |   |   |   |   |   | (1) | (11) | 0 |
| Net income (loss)                                                                                                                          |           |            |   |   |   |   |   |   | 2,432 | (2,247) | (1,195) |
| Less: Net income attributable to non-controlling interests                                                                                 |           |            |   |   |   |   |   |   | 0 | 0 | 0 |
| Net income (loss) attributable to Navistar International Corporation                                                                       |           |            |   |   |   |   |   |   | $ 2,432 | $ (2,247) | $ (1,195) |

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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Total costs related to goods produced and sold during the reporting period.
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| - Definition
Total costs of sales and operating expenses for the period.
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| - Definition
The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.
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| - Definition
This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.
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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 portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of Net Income (Loss) attributable to noncontrolling interest.
+ References
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| - Definition
The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.
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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.
+ References
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| - Definition
Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.
+ References
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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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