| **Commitments and Contingencies - Narrative (Details) BRL in Millions**                                                                                                                                   |              |             |          | 1 Months Ended | 3 Months Ended  | 9 Months Ended |         |        |                 |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------|-------------|----------|----------------|-----------------|----------------|---------|--------|-----------------|
||
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Available stand-by letters of credit and surety bonds                                                                                                                                                     |         |        |     |           | $ 97,000,000    |           |    |   | $ 97,000,000    |   |   |   |
| Purchase commitments                                                                                                                                                                                      |         |        |     |           | 16,000,000      |           |    |   | $ 16,000,000    |   |   |   |
| Long Term Purchase Commitment Cancellation Fees                                                                                                                                                           |         |        |     |           | $ 59,000,000    |           |    |   |            |   |   |   |
| Number of Contaminated Sites | site                                                                                                                                                                       |         |        |     |           | 2               |           |    |   | 2               | 2 |   |   |
| Number of Contaminated Sites in Sao Paulo, Brazil | site                                                                                                                                                  |         |        |     |           | 2               |           |    |   | 2               | 2 |   |   |
| Accrual for environmental loss contingencies                                                                                                                                                              |         |        |     |           | $ 20,000,000    |           |    |   | $ 20,000,000    |   |   |   |
| Sao Paulo Groundwater Notice [Member] | Sanctions [Member]                                                                                                                                                |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Damages sought, value                                                                                                                                                                                     |         |        |     | BRL 3          | 1,000,000       |           |    |   |            |   |   |   |
| International Chamber of Commerce [Member] | Penalties and Interest [Member]                                                                                                                              |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Damages sought, value                                                                                                                                                                                     |         |        |     |           | 20,000,000      |           |    |   |            |   |   |   |
| Navitrucks [Member] | Alleged Unfulfilled Promises and Injury to Reputation [Member]                                                                                                                      |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Damages sought, value                                                                                                                                                                                     |         |        |     |           | $ 40,000,000    |           |    |   |            |   |   |   |
| Damages from Product Defects [Member]                                                                                                                                                                     |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Notice of Violation, number | engine                                                                                                                                                                      |         |        |     |           |            |           |    |   |            |   |   | 7,749 |
| Civil penalties sought, per violation                                                                                                                                                                     |         |        | $ 37,500 |           |            |           |    |   |            |   |   |   |
| G E Operating Agreement [Member]                                                                                                                                                                          |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Operating Agreement Excess Loss Percentage                                                                                                                                                                |         |        |     |           | 10.00%          | 10.00%         |    |   |            |   |   |   |
| Loss Sharing Agreement, Percentage                                                                                                                                                                        |         |        |     |           | 9.50%           |           |    |   | 9.50%           | 9.50% |   |   |
| Off Balance Sheet Finance Receivables                                                                                                                                                                     |         |        |     |           | $ 1,400,000,000 |           |    |   | $ 1,400,000,000 |   | $ 1,400,000,000 |   |
| Off Balance Sheet Finance Receivables Related Originations1                                                                                                                                               |         |        |     |           | 2,400,000,000   |           |    |   | 2,400,000,000   |   | 2,300,000,000 |   |
| G E Operating Agreement [Member]                                                                                                                                                                          |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Equipment leased to others                                                                                                                                                                                |         |        |     |           | 57,000,000      |           |    |   | 57,000,000      |   | 102,000,000 |   |
| Manufacturing Operations [Member] | Financed lease obligations [Member]                                                                                                                                   |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Long-term Debt                                                                                                                                                                                            |         |        |     |           | 61,000,000      |           |    |   | 61,000,000      |   | 111,000,000 |   |
| Manufacturing Operations [Member] | G E Operating Agreement [Member] | Financed lease obligations [Member]                                                                                                |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Long-term Debt                                                                                                                                                                                            |         |        |     |           | 61,000,000      |           |    |   | 61,000,000      |   | $ 110,000,000 |   |
| Pending Litigation [Member] | Disputes [Member]                                                                                                                                                           |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Damages sought, value                                                                                                                                                                                     |         |        |     |           | 50,000,000      |           |    |   |            |   |   |   |
| Pending Litigation [Member] | FATMA Notice, Trial [Member] | Penalties [Member]                                                                                                                           |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Damages sought, value                                                                                                                                                                                     |         |        |     |           | 1,000,000       |           |    | BRL 2  |            |   |   |   |
| IIAA Vs. Navitrucks [Member]                                                                                                                                                                              |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Gain Contingency, Unrecorded Amount                                                                                                                                                                       |         |        |     |           | 40,000,000      |           |    |   | 40,000,000      |   |   |   |
| IIAA Vs. Navitrucks [Member] | International Chamber of Commerce [Member] | Penalties and Interest [Member]                                                                                               |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Damages sought, value                                                                                                                                                                                     |         |        |     |           | 23,000,000      |           |    |   |            |   |   |   |
| Navitrucks Vs. IIAA [Member]                                                                                                                                                                              |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Loss Contingency, Estimate of Possible Loss                                                                                                                                                               |         |        |     |           | $ 43,000,000    |           |    |   | $ 43,000,000    |   |   |   |
| Polar Express School Bus and Lakeview Bus Lines v. Navistar, Inc and IC Bus LLC [Member] | Pending Litigation [Member] | Damages from Product Defects [Member]                                            |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Loss Contingency, Number of Buses | bus                                                                                                                                                                   | 40           |        |     |           |            |           |    |   |            |   |   |   |
| Loss Contingency, Damages Sought, Value, Compensatory Damages                                                                                                                                             | $ 6,700,000  |        |     |           |            |           |    |   |            |   |   |   |
| Loss Contingency, Damages Sought, Value, Punitive Damages                                                                                                                                                 | $ 50,000,000 |        |     |           |            |           |    |   |            |   |   |   |
| SEC v. Navistar [Member] | Settled Litigation [Member]                                                                                                                                                    |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Loss Contingency, Damages Paid, Value                                                                                                                                                                     |         | $ 7,500,000 |     |           |            |           |    |   |            |   |   |   |
| Brazil, Brazil Real | International Chamber of Commerce [Member] | Penalties and Interest [Member]                                                                                                        |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Damages sought, value | BRL                                                                                                                                                                               |         |        |     |           |            |           | BRL 64  |   |            |   |   |   |
| Brazil, Brazil Real | Navitrucks [Member] | Alleged Unfulfilled Promises and Injury to Reputation [Member]                                                                                                |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Damages sought, value | BRL                                                                                                                                                                               |         |        |     |           |            |           | BRL 128 |   |            |   |   |   |
| Brazil, Brazil Real | IIAA Vs. Navitrucks [Member]                                                                                                                                                        |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Gain Contingency, Unrecorded Amount | BRL                                                                                                                                                                 |         |        |     |           |            |           |    |   |            | BRL 130 |   |   |
| Brazil, Brazil Real | IIAA Vs. Navitrucks [Member] | International Chamber of Commerce [Member] | Penalties and Interest [Member]                                                                         |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Damages sought, value | BRL                                                                                                                                                                               |         |        |     |           |            | BRL 73         |    |   |            |   |   |   |
| Brazil, Brazil Real | Navitrucks Vs. IIAA [Member]                                                                                                                                                        |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Loss Contingency, Estimate of Possible Loss | BRL                                                                                                                                                         |         |        |     |           |            |           |    |   |            | BRL 139 |   |   |
| International Indústria de Motores da América do Sul Ltda [Member] | Other Cases Vs. International Indústria de Motores da América do Sul Ltda [Member] | Pending Litigation [Member] |         |        |     |           |            |           |    |   |            |   |   |   |
| **Loss Contingencies [Line Items]**                                                                                                                                                                       |         |        |     |           |            |           |    |   |            |   |   |   |
| Loss Contingency, Number of Truck Dealers | dealer                                                                                                                                                        |         |        |     |           |            |           |    |   | 2               |   |   |   |
| Loss Contingency, Number of Truck Fleet Owners | dealer                                                                                                                                                   |         |        |     |           |            |           |    |   | 2               |   |   |   |

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Long Term Purchase Commitment Cancellation Fees
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Loss Contingency, Civil Penalty Sought, Per Violation
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Loss Contingency, Damages Sought, Value, Compensatory Damages
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Loss Contingency, Damages Sought, Value, Punitive Damages
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Loss Contingency, Number of Buses
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Loss Contingency, Number of Truck Dealers
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Loss Sharing Agreement, Percentage
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Notice of Violation, number of engines
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Number of Contaminated Sites
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Number of Contaminated Sites in Sao Paulo, Brazil
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Operating Agreement Excess Loss Percentage
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| - Definition
Total costs accrued as of the balance sheet date for environmental loss contingencies.
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| - Definition
The amount or range of possible amounts of gain that could be realized upon the resolution of a contingency.
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| - Definition
The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.
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| - Definition
Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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| - Definition
Amount of damages paid to the plaintiff in the legal matter.
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| - Definition
The value (monetary amount) of the award the plaintiff seeks in the legal matter.
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| - Definition
Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.
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Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.
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