| **Restructuring and Impairments - Narrative (Details) - USD ($) $ in Millions**           | 3 Months Ended |        |
|-------------------------------------------------------------------------------------------|----------------|--------|
||
| **Restructuring Cost and Reserve [Line Items]**                                           |           |   |   |   |
| Restructuring charges                                                                     | $ 7            | $ 3    |   |   |
| Restructuring and Related Cost, Incurred Cost                                             | 6              | 4      |   |   |
| Asset impairment charges                                                                  | 2              | 2      |   |   |
| Goodwill                                                                                  | 38             |   |   | $ 38 |
| Other Restructuring [Member]                                                              |           |   |   |   |
| **Restructuring Cost and Reserve [Line Items]**                                           |           |   |   |   |
| Restructuring and Related Cost, Incurred Cost                                             | 0              | 0      |   |   |
| Employee Severance [Member]                                                               |           |   |   |   |
| **Restructuring Cost and Reserve [Line Items]**                                           |           |   |   |   |
| Restructuring and Related Cost, Incurred Cost                                             | 6              | 4      |   |   |
| Lease Vacancy [Member] [Domain]                                                           |           |   |   |   |
| **Restructuring Cost and Reserve [Line Items]**                                           |           |   |   |   |
| Restructuring and Related Cost, Incurred Cost                                             | 0              | $ 0    |   |   |
| Minimum [Member] | Chatham [Member] | North America Truck [Member]                        |           |   |   |   |
| **Restructuring Cost and Reserve [Line Items]**                                           |           |   |   |   |
| Restructuring and Related Cost, Expected Cost                                             | 0              |   |   |   |
| Maximum [Member] | Chatham [Member] | North America Truck [Member]                        |           |   |   |   |
| **Restructuring Cost and Reserve [Line Items]**                                           |           |   |   |   |
| Restructuring and Related Cost, Expected Cost                                             | 45             |   |   |   |
| Other Postretirement Benefit Plan [Member] | Chatham [Member] | Facility Closing [Member] |           |   |   |   |
| **Restructuring Cost and Reserve [Line Items]**                                           |           |   |   |   |
| Postemployment Benefits, Period Expense                                                   | $ 6            |   | $ 14 |   |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
+ References
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| X                                                                                                                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Period expense related to postemployment benefits.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount expected to be recognized in earnings for the specified restructuring cost.
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| - Definition
Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.
+ References
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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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