| **Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Statement of Operations (Details) - USD ($) $ in Millions** | 3 Months Ended | 9 Months Ended |
|-------------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| Sales and revenues, net                                                                                                                   | $ 2,086        | $ 2,538        | $ 6,048 | $ 7,652 |
| Costs of products sold                                                                                                                    | 1,757          | 2,172          | 5,068 | 6,577 |
| Restructuring charges                                                                                                                     | 5              | 13             | 11 | 22 |
| Asset impairment charges                                                                                                                  | 12             | 7              | 17 | 15 |
| All other operating expenses (income)                                                                                                     | 328            | 360            | 969 | 1,120 |
| Total costs and expenses                                                                                                                  | 2,102          | 2,552          | 6,065 | 7,734 |
| Equity in income of non-consolidated affiliates                                                                                           | 2              | 3              | 3 | 6 |
| Income (loss) before income taxes                                                                                                         | (14)           | (11)           | (14) | (76) |
| Income tax expense                                                                                                                        | (14)           | (12)           | (25) | (37) |
| Earnings (loss) from continuing operations                                                                                                | (28)           | (23)           | (39) | (113) |
| Income from discontinued operations, net of tax                                                                                           | 0              | 2              | 0 | 2 |
| Net income (loss)                                                                                                                         | (28)           | (21)           | (39) | (111) |
| Less: Net income attributable to non-controlling interests                                                                                | 6              | 7              | 24 | 23 |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent                                                                           | (10)           | (42)           | 26 | (169) |
| Net income (loss) attributable to Navistar International Corporation                                                                      | (34)           | (28)           | (63) | (134) |
| Parent Company [Member]                                                                                                                   |           |           |   |   |
| Sales and revenues, net                                                                                                                   | 0              | 0              | 0 | 0 |
| Costs of products sold                                                                                                                    | 0              | 0              | 0 | 0 |
| Restructuring charges                                                                                                                     | 0              | 0              | 0 | 0 |
| Asset impairment charges                                                                                                                  | 0              | 0              | 0 | 0 |
| All other operating expenses (income)                                                                                                     | 18             | 12             | 75 | 62 |
| Total costs and expenses                                                                                                                  | 18             | 12             | 75 | 62 |
| Equity in income of non-consolidated affiliates                                                                                           | (16)           | (16)           | 12 | (72) |
| Income (loss) before income taxes                                                                                                         | (34)           | (28)           | (63) | (134) |
| Income tax expense                                                                                                                        | 0              | 0              | 0 | 0 |
| Earnings (loss) from continuing operations                                                                                                | (34)           | (28)           | (63) | (134) |
| Income from discontinued operations, net of tax                                                                                           | 0              | 0              | 0 | 0 |
| Net income (loss)                                                                                                                         | (34)           | (28)           | (63) | (134) |
| Less: Net income attributable to non-controlling interests                                                                                | 0              | 0              | 0 | 0 |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent                                                                           | (10)           | (42)           | 26 | (169) |
| Net income (loss) attributable to Navistar International Corporation                                                                      | (34)           | (28)           | (63) | (134) |
| Guarantor Subsidiaries [Member]                                                                                                           |           |           |   |   |
| Sales and revenues, net                                                                                                                   | 1,411          | 1,892          | 4,455 | 5,511 |
| Costs of products sold                                                                                                                    | 1,276          | 1,752          | 4,028 | 5,025 |
| Restructuring charges                                                                                                                     | (1)            | 5              | 3 | 8 |
| Asset impairment charges                                                                                                                  | 0              | 0              | 2 | 8 |
| All other operating expenses (income)                                                                                                     | 197            | 262            | 643 | 808 |
| Total costs and expenses                                                                                                                  | 1,472          | 2,019          | 4,676 | 5,849 |
| Equity in income of non-consolidated affiliates                                                                                           | 63             | 76             | 118 | 155 |
| Income (loss) before income taxes                                                                                                         | 2              | (51)           | (103) | (183) |
| Income tax expense                                                                                                                        | (1)            | (1)            | 10 | (3) |
| Earnings (loss) from continuing operations                                                                                                | 1              | (52)           | (93) | (186) |
| Income from discontinued operations, net of tax                                                                                           | 0              | 0              | 0 | 0 |
| Net income (loss)                                                                                                                         | 1              | (52)           | (93) | (186) |
| Less: Net income attributable to non-controlling interests                                                                                | 0              | 0              | 0 | 0 |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent                                                                           | 34             | (44)           | 3 | (116) |
| Net income (loss) attributable to Navistar International Corporation                                                                      | 1              | (52)           | (93) | (186) |
| Non-Guarantor Subsidiaries [Member]                                                                                                       |           |           |   |   |
| Sales and revenues, net                                                                                                                   | 1,432          | 1,875          | 4,055 | 5,586 |
| Costs of products sold                                                                                                                    | 1,216          | 1,627          | 3,447 | 4,932 |
| Restructuring charges                                                                                                                     | 6              | 8              | 8 | 14 |
| Asset impairment charges                                                                                                                  | 12             | 7              | 15 | 7 |
| All other operating expenses (income)                                                                                                     | 131            | 102            | 305 | 306 |
| Total costs and expenses                                                                                                                  | 1,365          | 1,744          | 3,775 | 5,259 |
| Equity in income of non-consolidated affiliates                                                                                           | 1              | 2              | 0 | 3 |
| Income (loss) before income taxes                                                                                                         | 68             | 133            | 280 | 330 |
| Income tax expense                                                                                                                        | (13)           | (11)           | (35) | (34) |
| Earnings (loss) from continuing operations                                                                                                | 55             | 122            | 245 | 296 |
| Income from discontinued operations, net of tax                                                                                           | 0              | 2              | 0 | 2 |
| Net income (loss)                                                                                                                         | 55             | 124            | 245 | 298 |
| Less: Net income attributable to non-controlling interests                                                                                | 6              | 7              | 24 | 23 |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent                                                                           | 40             | 95             | 214 | 170 |
| Net income (loss) attributable to Navistar International Corporation                                                                      | 49             | 117            | 221 | 275 |
| Consolidation, Eliminations [Member]                                                                                                      |           |           |   |   |
| Sales and revenues, net                                                                                                                   | (757)          | (1,229)        | (2,462) | (3,445) |
| Costs of products sold                                                                                                                    | (735)          | (1,207)        | (2,407) | (3,380) |
| Restructuring charges                                                                                                                     | 0              | 0              | 0 | 0 |
| Asset impairment charges                                                                                                                  | 0              | 0              | 0 | 0 |
| All other operating expenses (income)                                                                                                     | (18)           | (16)           | (54) | (56) |
| Total costs and expenses                                                                                                                  | (753)          | (1,223)        | (2,461) | (3,436) |
| Equity in income of non-consolidated affiliates                                                                                           | (46)           | (59)           | (127) | (80) |
| Income (loss) before income taxes                                                                                                         | (50)           | (65)           | (128) | (89) |
| Income tax expense                                                                                                                        | 0              | 0              | 0 | 0 |
| Earnings (loss) from continuing operations                                                                                                | (50)           | (65)           | (128) | (89) |
| Income from discontinued operations, net of tax                                                                                           | 0              | 0              | 0 | 0 |
| Net income (loss)                                                                                                                         | (50)           | (65)           | (128) | (89) |
| Less: Net income attributable to non-controlling interests                                                                                | 0              | 0              | 0 | 0 |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent                                                                           | (74)           | (51)           | (217) | (54) |
| Net income (loss) attributable to Navistar International Corporation                                                                      | $ (50)         | $ (65)         | $ (128) | $ (89) |

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| - Definition
Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.
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| - Definition
Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.
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Total costs related to goods produced and sold during the reporting period.
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Total costs of sales and operating expenses for the period.
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| - Definition
Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.
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Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.
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| - Definition
Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.
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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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Amount of current income tax expense (benefit) and deferred income tax expense (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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Amount of Net Income (Loss) attributable to noncontrolling interest.
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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.
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