| **Stockholders' Deficit Accumulated Other Comprehensive Income (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions** | 3 Months Ended | 9 Months Ended |           |
|---------------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|-----------|
||
| **Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]**                                                                |           |           |      |   |   |   |
| Accumulated Other Comprehensive Loss, Beginning Balance                                                                                     | $ (1,786)      | $ (2,154)      |      | $ (1,920) | $ (2,211) |   |
| Other comprehensive loss before reclassifications                                                                                           | 9              | (13)           |      | (3) | (21) |   |
| Amounts reclassified out of accumulated other comprehensive loss                                                                            | 23             | 29             |      | 169 | 94 |   |
| Net current-period other comprehensive income (loss)                                                                                        | 32             | 16             |      | 166 | 73 |   |
| Accumulated Other Comprehensive Loss, Ending Balance                                                                                        | (1,754)        | (2,138)        | $ (2,211) | (1,754) | (2,138) |   |
| **Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]**                                     |           |           |      |   |   |   |
| Restructuring Charges                                                                                                                       | 0              | 1              | 6         | 1 | 1 |   |
| Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax                                 | 0              | 0              |      |   |   |   |
| Tax expense                                                                                                                                 | (29)           | (3)            |      | (9) | (25) |   |
| Net income (loss) attributable to Navistar International Corporation                                                                        | $ 156          | 170            |      | $ 119 | 152 |   |
| Common stock, shares authorized                                                                                                             | 220            |           |      | 220 |   | 220 |
| Common stock, par value                                                                                                                     | $ 0.1          |           |      | $ 0.1 |   | $ 0.10 |
| Accumulated Translation Adjustment [Member]                                                                                                 |           |           |      |   |   |   |
| **Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]**                                                                |           |           |      |   |   |   |
| Accumulated Other Comprehensive Loss, Beginning Balance                                                                                     | $ (319)        | (289)          |      | $ (315) | (283) |   |
| Other comprehensive loss before reclassifications                                                                                           | 9              | (13)           |      | 5 | (19) |   |
| Amounts reclassified out of accumulated other comprehensive loss                                                                            | 0              | 0              |      | 0 | 0 |   |
| Net current-period other comprehensive income (loss)                                                                                        | 9              | (13)           |      | 5 | (19) |   |
| Accumulated Other Comprehensive Loss, Ending Balance                                                                                        | (310)          | (302)          | (283)     | (310) | (302) |   |
| Pension Benefits                                                                                                                            |           |           |      |   |   |   |
| **Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]**                                                                |           |           |      |   |   |   |
| Accumulated Other Comprehensive Loss, Beginning Balance                                                                                     | (1,467)        | (1,865)        |      | (1,605) | (1,928) |   |
| Other comprehensive loss before reclassifications                                                                                           | 0              | 0              |      | (8) | (2) |   |
| Amounts reclassified out of accumulated other comprehensive loss                                                                            | 23             | 29             |      | 169 | 94 |   |
| Net current-period other comprehensive income (loss)                                                                                        | 23             | 29             |      | 161 | 92 |   |
| Accumulated Other Comprehensive Loss, Ending Balance                                                                                        | (1,444)        | (1,836)        | $ (1,928) | (1,444) | (1,836) |   |
| **Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]**                                     |           |           |      |   |   |   |
| Amortization of actuarial loss                                                                                                              | 23             | 29             |      | 70 | 86 |   |
| Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension Benefits                                                  |           |           |      |   |   |   |
| **Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]**                                     |           |           |      |   |   |   |
| Amortization of actuarial loss                                                                                                              |           |           |      | 142 | 9 |   |
| Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest                             | (23)           | (29)           |      | (212) | (95) |   |
| Tax expense                                                                                                                                 | 0              | 0              |      | (43) | (1) |   |
| Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent                                                              | $ 23           | $ 29           |      | $ 169 | $ 94 |   |

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| - Definition
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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.
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Face amount or stated value per share of common stock.
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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.
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| - Definition
Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.
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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 after tax, before reclassification adjustments of other comprehensive income (loss).
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Amount, before tax, of increase (decrease) to other comprehensive income from settlement and curtailment gain (loss) of defined benefit plan.
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Amount after tax and reclassification adjustments of other comprehensive income (loss).
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Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan.
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Amount after tax of reclassification adjustments of other comprehensive income (loss).
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Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.
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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.
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