| **Selected quarterly financial data (Unaudited) (Details) (USD $)In Millions, except Per Share data, unless otherwise specified**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             | 3 Months Ended | 12 Months Ended |
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| 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 |  |
| Manufacturing gross margin                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 88             |                 | 401 | 311 |  | 310 |  | 845 | 560 |  | 597 |  | 494 |   |  |   |  |   |  |   |  |
| Net income (loss)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             | (2,756)        |                 | 96 | (162) |  | (140) |  | 275 | 1,409 |  | 88 |  | 6 |   |  | (2,962) |  | 1,778 |  | 267 |  |
| Net Income (Loss) Attributable to Noncontrolling Interest                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 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 |  |
| Earnings Per Share, Basic                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | $ (40.13)      |                 | $ 1.22 | $ (2.50) |  | $ (2.19) |  | $ 3.52 | $ 19.10 |  | $ 1.01 |  | $ (0.08) |   |  | $ (43.56) |  | $ 23.66 |  | $ 3.11 |  |
| Earnings Per Share, Diluted                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | $ (40.13)      |                 | $ 1.22 | $ (2.50) |  | $ (2.19) |  | $ 3.48 | $ 18.24 |  | $ 0.93 |  | $ (0.08) |   |  | $ (43.56) |  | $ 22.64 |  | $ 3.05 |  |
| Market Price Common Stock High                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                | $ 26.48        |                 | $ 35.25 | $ 48.18 |  | $ 45.44 |  | $ 52.36 | $ 70.40 |  | $ 71.49 |  | $ 66.39 |   |  |   |  |   |  |   |  |
| Market Price Common Stock Low                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | $ 18.17        |                 | $ 20.21 | $ 32.68 |  | $ 33.74 |  | $ 30.01 | $ 50.05 |  | $ 58.49 |  | $ 48.32 |   |  |   |  |   |  |   |  |
| Product Warranty Accrual, Preexisting, Increase (Decrease)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 149            | [1]             |   | 104 | [1] | 123 | [1] |   | 30 | [1] | 27 | [1] |   | 25 | [1] | 404 | [2] | 79 | [2] | 51 | [2] |
| Product Warranty Accrual Adjustment related to costs incurred in prior periods                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                | 28             | [1]             |   |   |  |   |  |   |   |  |   |  |   |   |  |   |  |   |  |   |  |
| Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |           |                 |   |   |  |   |  |   |   |  |   |  |   |   |  | 2,232 |  | (1,499) |  | (56) |  |
| Income tax expense related to reversal of previous quarter income tax benefits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                | 233            |                 |   |   |  |   |  |   |   |  |   |  |   |   |  |   |  |   |  |   |  |
| Valuation Allowance, Deferred Tax Asset, Change in Amount                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |           |                 |   |   |  |   |  |   |   |  |   |  |   |   |  | (2,300) |  |   |  |   |  |
| Domestic Tax Authority [Member]                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |           |                 |   |   |  |   |  |   |   |  |   |  |   |   |  |   |  |   |  |   |  |
| Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |           |                 |   |   |  |   |  |   |   |  |   |  |   |   |  | 2,000 |  |   |  |   |  |
| Valuation Allowance, Deferred Tax Asset, Change in Amount                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |           |                 |   |   |  |   |  |   |   |  |   |  |   |   |  | (189) |  |   |  |   |  |
| Correction Of Errors And Effect Of New Accounting Guidance Adoption [Member]                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |           |                 |   |   |  |   |  |   |   |  |   |  |   |   |  |   |  |   |  |   |  |
| Valuation Allowance, Deferred Tax Asset, Change in Amount                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |           |                 |   |   |  |   |  | $ 61 |   |  |   |  |   |   |  |   |  |   |  |   |  |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| [1]The warranty estimation for engines sold in 2012 includes a factor for improvements to the design and manufacturing process that was based on historical experience. In the fourth quarter of 2012 we identified a deviation from historic experience and we recorded an adjustment for a change in estimate to increase in the costs accrued for warranty of $28 million, or $0.41 per diluted share for products sold in the first three quarters of 2012.[2]In the first quarter of 2012, we recorded significant adjustments for changes in estimates of $123 million, or $1.76 per diluted share. In the second quarter of 2012, we recorded significant adjustments for changes in estimates of $104 million, or $1.51 per diluted share. In the fourth quarter of 2012, we recorded significant adjustments for changes in estimates of $149 million, or $2.16 per diluted share. In the third quarter of 2011, we recorded significant adjustments for changes in estimates of $30 million, or $0.39 per diluted share. In the second quarter of 2011, we recorded significant adjustments for changes in estimates of $27 million, or $0.34 per diluted share. In the third quarter of 2010, we recorded significant adjustments for changes in estimates of $25 million, or $0.34 diluted share. |

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| - Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.
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| - Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.
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| - Definition
Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.
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| - Definition
The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.
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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.
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| - Definition
Represents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting standard and extended product warranties (including adjustments for changes in estimates).
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| - Definition
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
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
The amount of the change in the period in the valuation allowance for a specified deferred tax asset.
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