| **Segment Reporting (Details) (USD $)In Millions, unless otherwise specified**                                                                                                                                                                                            | 3 Months Ended | 12 Months Ended |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------|-----------------|
||
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                            |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| Number Of Segments                                                                                                                                                                                                                                                        |           |            |   |   |   |   |   |   | 4 |  |   |  |   |  |
| External sales and revenues, net                                                                                                                                                                                                                                          |           |            |   |   |   |   |   |   | $ 12,948 |  | $ 13,958 |  | $ 12,145 |  |
| Intersegment sales and revenues                                                                                                                                                                                                                                           |           |            |   |   |   |   |   |   | 0 |  | 0 |  | 0 |  |
| 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 |  |
| Net income (loss) attributable to Navistar International Corporation                                                                                                                                                                                                      | (2,769)        | 84              | (172) | (153) | 255 | 1,400 | 74 | (6) | (3,010) |  | 1,723 |  | 223 |  |
| Income tax benefit (expense)                                                                                                                                                                                                                                              |           |            |   |   |   |   |   |   | (1,780) |  | 1,458 |  | (23) |  |
| Segment profit (loss)                                                                                                                                                                                                                                                     |           |            |   |   |   |   |   |   | (1,230) |  | 265 |  | 246 |  |
| Depreciation and amortization                                                                                                                                                                                                                                             |           |            |   |   |   |   |   |   | 323 |  | 328 |  | 316 |  |
| Interest expense                                                                                                                                                                                                                                                          |           |            |   |   |   |   |   |   | 259 |  | 247 |  | 253 |  |
| Equity in income (loss) of non-consolidated affiliates                                                                                                                                                                                                                    |           |            |   |   |   |   |   |   | (29) |  | (71) |  | (50) |  |
| Capital expenditures                                                                                                                                                                                                                                                      |           |            |   |   |   |   |   |   | 309 | [1] | 429 | [1] | 234 | [1] |
| Segment assets                                                                                                                                                                                                                                                            | (9,102)        |            |   |   | (12,291) |   |   |   | (9,102) |  | (12,291) |  | (9,730) |  |
| Customer Concentration Risk [Domain]                                                                                                                                                                                                                                      |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                            |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| Concentration Risk, Percentage                                                                                                                                                                                                                                            |           |            |   |   |   |   |   |   | 10.00% |  | 13.00% |  | 15.00% |  |
| Truck [Domain]                                                                                                                                                                                                                                                            |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                            |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| External sales and revenues, net                                                                                                                                                                                                                                          |           |            |   |   |   |   |   |   | 9,034 | [2] | 9,690 | [2] | 8,205 | [2] |
| Intersegment sales and revenues                                                                                                                                                                                                                                           |           |            |   |   |   |   |   |   | 35 | [2] | 48 | [2] | 2 | [2] |
| Sales and revenues, net                                                                                                                                                                                                                                                   |           |            |   |   |   |   |   |   | 9,069 | [2] | 9,738 | [2] | 8,207 | [2] |
| Net income (loss) attributable to Navistar International Corporation                                                                                                                                                                                                      |           |            |   |   |   |   |   |   | (320) | [2] | 336 | [2] | 424 | [2] |
| Income tax benefit (expense)                                                                                                                                                                                                                                              |           |            |   |   |   |   |   |   | 0 | [2] | 0 | [2] | 0 | [2] |
| Segment profit (loss)                                                                                                                                                                                                                                                     |           |            |   |   |   |   |   |   | (320) | [2] | 336 | [2] | 424 | [2] |
| Depreciation and amortization                                                                                                                                                                                                                                             |           |            |   |   |   |   |   |   | 140 | [2] | 151 | [2] | 160 | [2] |
| Interest expense                                                                                                                                                                                                                                                          |           |            |   |   |   |   |   |   | 0 | [2] | 0 | [2] | 0 | [2] |
| Equity in income (loss) of non-consolidated affiliates                                                                                                                                                                                                                    |           |            |   |   |   |   |   |   | (28) | [2] | (73) | [2] | (51) | [2] |
| Capital expenditures                                                                                                                                                                                                                                                      |           |            |   |   |   |   |   |   | 75 | [1],[2] | 83 | [1],[2] | 82 | [1],[2] |
| Segment assets                                                                                                                                                                                                                                                            | (2,118)        |            |   |   | (2,771) |   |   |   | (2,118) |  | (2,771) |  | (2,457) |  |
| Engine [Member]                                                                                                                                                                                                                                                           |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                            |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| External sales and revenues, net                                                                                                                                                                                                                                          |           |            |   |   |   |   |   |   | 1,755 |  | 2,101 |  | 2,031 |  |
| Intersegment sales and revenues                                                                                                                                                                                                                                           |           |            |   |   |   |   |   |   | 1,639 |  | 1,690 |  | 955 |  |
| Sales and revenues, net                                                                                                                                                                                                                                                   |           |            |   |   |   |   |   |   | 3,394 |  | 3,791 |  | 2,986 |  |
| Net income (loss) attributable to Navistar International Corporation                                                                                                                                                                                                      |           |            |   |   |   |   |   |   | (562) |  | 84 |  | 51 |  |
| Income tax benefit (expense)                                                                                                                                                                                                                                              |           |            |   |   |   |   |   |   | 0 |  | 0 |  | 0 |  |
| Segment profit (loss)                                                                                                                                                                                                                                                     |           |            |   |   |   |   |   |   | (562) |  | 84 |  | 51 |  |
| Depreciation and amortization                                                                                                                                                                                                                                             |           |            |   |   |   |   |   |   | 118 |  | 120 |  | 106 |  |
| Interest expense                                                                                                                                                                                                                                                          |           |            |   |   |   |   |   |   | 0 |  | 0 |  | 0 |  |
| Equity in income (loss) of non-consolidated affiliates                                                                                                                                                                                                                    |           |            |   |   |   |   |   |   | (7) |  | (4) |  | (2) |  |
| Capital expenditures                                                                                                                                                                                                                                                      |           |            |   |   |   |   |   |   | 148 | [1] | 172 | [1] | 116 | [1] |
| Segment assets                                                                                                                                                                                                                                                            | (1,777)        |            |   |   | (1,849) |   |   |   | (1,777) |  | (1,849) |  | (1,715) |  |
| Parts [Member]                                                                                                                                                                                                                                                            |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                            |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| Number Of Regional Parts Distribution Centers                                                                                                                                                                                                                             | 11             |            |   |   |   |   |   |   | 11 |  |   |  |   |  |
| External sales and revenues, net                                                                                                                                                                                                                                          |           |            |   |   |   |   |   |   | 1,991 |  | 1,967 |  | 1,690 |  |
| Intersegment sales and revenues                                                                                                                                                                                                                                           |           |            |   |   |   |   |   |   | 128 |  | 188 |  | 195 |  |
| Sales and revenues, net                                                                                                                                                                                                                                                   |           |            |   |   |   |   |   |   | 2,119 |  | 2,155 |  | 1,885 |  |
| Net income (loss) attributable to Navistar International Corporation                                                                                                                                                                                                      |           |            |   |   |   |   |   |   | 240 |  | 287 |  | 266 |  |
| Income tax benefit (expense)                                                                                                                                                                                                                                              |           |            |   |   |   |   |   |   | 0 |  | 0 |  | 0 |  |
| Segment profit (loss)                                                                                                                                                                                                                                                     |           |            |   |   |   |   |   |   | 240 |  | 287 |  | 266 |  |
| Depreciation and amortization                                                                                                                                                                                                                                             |           |            |   |   |   |   |   |   | 10 |  | 9 |  | 7 |  |
| Interest expense                                                                                                                                                                                                                                                          |           |            |   |   |   |   |   |   | 0 |  | 0 |  | 0 |  |
| Equity in income (loss) of non-consolidated affiliates                                                                                                                                                                                                                    |           |            |   |   |   |   |   |   | 6 |  | 6 |  | 3 |  |
| Capital expenditures                                                                                                                                                                                                                                                      |           |            |   |   |   |   |   |   | 21 | [1] | 19 | [1] | 8 | [1] |
| Segment assets                                                                                                                                                                                                                                                            | (707)          |            |   |   | (700) |   |   |   | (707) |  | (700) |  | (811) |  |
| Financial Services Operations [Member]                                                                                                                                                                                                                                    |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                            |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| Financing fees and revenues reimbursement                                                                                                                                                                                                                                 |           |            |   |   | 11 |   |   |   |   |  |   |  |   |  |
| External sales and revenues, net                                                                                                                                                                                                                                          |           |            |   |   |   |   |   |   | 168 | [3] | 200 | [3] | 219 | [3] |
| Intersegment sales and revenues                                                                                                                                                                                                                                           |           |            |   |   |   |   |   |   | 91 | [3] | 91 | [3] | 90 | [3] |
| Sales and revenues, net                                                                                                                                                                                                                                                   |           |            |   |   |   |   |   |   | 259 | [3] | 291 | [3] | 309 | [3] |
| Net income (loss) attributable to Navistar International Corporation                                                                                                                                                                                                      |           |            |   |   |   |   |   |   | 91 | [3] | 129 | [3] | 95 | [3] |
| Income tax benefit (expense)                                                                                                                                                                                                                                              |           |            |   |   |   |   |   |   | 0 | [3] | 0 | [3] | 0 | [3] |
| Segment profit (loss)                                                                                                                                                                                                                                                     |           |            |   |   |   |   |   |   | 91 | [3] | 129 | [3] | 95 | [3] |
| Depreciation and amortization                                                                                                                                                                                                                                             |           |            |   |   |   |   |   |   | 33 | [3] | 28 | [3] | 28 | [3] |
| Interest expense                                                                                                                                                                                                                                                          |           |            |   |   |   |   |   |   | 88 | [3] | 109 | [3] | 113 | [3] |
| Equity in income (loss) of non-consolidated affiliates                                                                                                                                                                                                                    |           |            |   |   |   |   |   |   | 0 | [3] | 0 | [3] | 0 | [3] |
| Capital expenditures                                                                                                                                                                                                                                                      |           |            |   |   |   |   |   |   | 3 | [1],[3] | 2 | [1],[3] | 2 | [1],[3] |
| Segment assets                                                                                                                                                                                                                                                            | (2,563)        |            |   |   | (3,580) |   |   |   | (2,563) |  | (3,580) |  | (3,497) |  |
| Interest revenues                                                                                                                                                                                                                                                         |           |            |   |   |   |   |   |   | 254 |  | 285 |  | 270 |  |
| Corporate And Eliminations [Member]                                                                                                                                                                                                                                       |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| **Segment Reporting Information [Line Items]**                                                                                                                                                                                                                            |           |            |   |   |   |   |   |   |   |  |   |  |   |  |
| External sales and revenues, net                                                                                                                                                                                                                                          |           |            |   |   |   |   |   |   | 0 |  | 0 |  | 0 |  |
| Intersegment sales and revenues                                                                                                                                                                                                                                           |           |            |   |   |   |   |   |   | (1,893) |  | (2,017) |  | (1,242) |  |
| Sales and revenues, net                                                                                                                                                                                                                                                   |           |            |   |   |   |   |   |   | (1,893) |  | (2,017) |  | (1,242) |  |
| Net income (loss) attributable to Navistar International Corporation                                                                                                                                                                                                      |           |            |   |   |   |   |   |   | (2,459) |  | 887 |  | (613) |  |
| Income tax benefit (expense)                                                                                                                                                                                                                                              |           |            |   |   |   |   |   |   | (1,780) |  | 1,458 |  | (23) |  |
| Segment profit (loss)                                                                                                                                                                                                                                                     |           |            |   |   |   |   |   |   | (679) |  | (571) |  | (590) |  |
| Depreciation and amortization                                                                                                                                                                                                                                             |           |            |   |   |   |   |   |   | 22 |  | 20 |  | 15 |  |
| Interest expense                                                                                                                                                                                                                                                          |           |            |   |   |   |   |   |   | 171 |  | 138 |  | 140 |  |
| Equity in income (loss) of non-consolidated affiliates                                                                                                                                                                                                                    |           |            |   |   |   |   |   |   | 0 |  | 0 |  | 0 |  |
| Capital expenditures                                                                                                                                                                                                                                                      |           |            |   |   |   |   |   |   | 62 | [1] | 153 | [1] | 26 | [1] |
| Segment assets                                                                                                                                                                                                                                                            | $ (1,937)      |            |   |   | $ (3,391) |   |   |   | $ (1,937) |  | $ (3,391) |  | $ (1,250) |  |
|                                                                                                                                                                                                                                                                           |
| [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 $254 million, $285 million, and $270 million for |

| X                                                                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Financing Fees And Revenue Reimbursement
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| - Definition
Number Of Regional Parts Distribution Centers
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| - Definition
Amount of profit or loss recognized by the reportable segment.
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No definition available.
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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
For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.
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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.
+ References
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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.
+ References
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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.
+ References
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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.
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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
Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.
+ References
No definition available.
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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.
+ References
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