| **Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Statement of Comprehsive Income (Details) - USD ($) $ in Millions** | 3 Months Ended | 9 Months Ended |
|---------------------------------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| Net loss attributable to Navistar International Corporation                                                                                       | $ (28)         | $ (2)          | $ (134) | $ (547) |
| **Other comprehensive income (loss):**                                                                                                            |           |           |   |   |
| Foreign currency translation adjustment                                                                                                           | (47)           | (3)            | (133) | (17) |
| Defined benefit plans (net of tax of $0, for all entities)                                                                                        | 33             | 33             | 98 | 83 |
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent                                                                     | (14)           | 30             | (35) | 66 |
| Total comprehensive loss attributable to Navistar International Corporation                                                                       | (42)           | 28             | (169) | (481) |
| Defined benefit plan, tax                                                                                                                         | 0              | (3)            | (1) | (4) |
| Parent Company [Member]                                                                                                                           |           |           |   |   |
| Net loss attributable to Navistar International Corporation                                                                                       | (28)           | (2)            | (134) | (547) |
| **Other comprehensive income (loss):**                                                                                                            |           |           |   |   |
| Foreign currency translation adjustment                                                                                                           | (47)           | (3)            | (133) | (17) |
| Defined benefit plans (net of tax of $0, for all entities)                                                                                        | 33             | 33             | 98 | 83 |
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent                                                                     | (14)           | 30             | (35) | 66 |
| Total comprehensive loss attributable to Navistar International Corporation                                                                       | (42)           | 28             | (169) | (481) |
| Defined benefit plan, tax                                                                                                                         | 0              | (3)            |   |   |
| Guarantor Subsidiaries [Member]                                                                                                                   |           |           |   |   |
| Net loss attributable to Navistar International Corporation                                                                                       | (52)           | (42)           | (186) | (624) |
| **Other comprehensive income (loss):**                                                                                                            |           |           |   |   |
| Foreign currency translation adjustment                                                                                                           | 0              | 0              | 0 | 0 |
| Defined benefit plans (net of tax of $0, for all entities)                                                                                        | 8              | 23             | 70 | 73 |
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent                                                                     | 8              | 23             | 70 | 73 |
| Total comprehensive loss attributable to Navistar International Corporation                                                                       | (44)           | (19)           | (116) | (551) |
| Defined benefit plan, tax                                                                                                                         | 14             | 0              |   |   |
| Non-Guarantor Subsidiaries [Member]                                                                                                               |           |           |   |   |
| Net loss attributable to Navistar International Corporation                                                                                       | 117            | 76             | 275 | 13 |
| **Other comprehensive income (loss):**                                                                                                            |           |           |   |   |
| Foreign currency translation adjustment                                                                                                           | (47)           | (3)            | (133) | (17) |
| Defined benefit plans (net of tax of $0, for all entities)                                                                                        | 25             | 10             | 28 | 10 |
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent                                                                     | (22)           | 7              | (105) | (7) |
| Total comprehensive loss attributable to Navistar International Corporation                                                                       | 95             | 83             | 170 | 6 |
| Defined benefit plan, tax                                                                                                                         | (14)           | (3)            |   |   |
| Consolidation, Eliminations [Member]                                                                                                              |           |           |   |   |
| Net loss attributable to Navistar International Corporation                                                                                       | (65)           | (34)           | (89) | 611 |
| **Other comprehensive income (loss):**                                                                                                            |           |           |   |   |
| Foreign currency translation adjustment                                                                                                           | 47             | 3              | 133 | 17 |
| Defined benefit plans (net of tax of $0, for all entities)                                                                                        | (33)           | (33)           | (98) | (83) |
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent                                                                     | 14             | (30)           | 35 | (66) |
| Total comprehensive loss attributable to Navistar International Corporation                                                                       | (51)           | (64)           | $ (54) | $ 545 |
| Defined benefit plan, tax                                                                                                                         | $ 0            | $ 3            |   |   |

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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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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 and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans, attributable to parent entity.
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Amount of tax (expense) benefit, after reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans, attributable to parent entity.
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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity.
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Amount after tax of other comprehensive income (loss) attributable to parent entity.
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