| **Leases (Details 2) - USD ($) $ in Millions**                                                          | Sep. 30, 2019 | Dec. 31, 2018 |
|---------------------------------------------------------------------------------------------------------|---------------|---------------|
| **Property, Plant and Equipment**                                                                       |          |          |
| Carrying amount of residual assets covered by residual value guarantees and subject to operating leases | $ 20          | $ 25          |
| **Payments due for operating leases**                                                                   |          |          |
| Remaining Three Months of 2019                                                                          | 245           |          |
| 2020                                                                                                    | 758           |          |
| 2021                                                                                                    | 433           |          |
| 2022                                                                                                    | 216           |          |
| 2023                                                                                                    | 96            |          |
| Thereafter                                                                                              | 58            |          |
| Total                                                                                                   | 1,806         |          |
| **Scheduled minimum rental payments for operating leases**                                              |          |          |
| 2019                                                                                                    |          | 808           |
| 2020                                                                                                    |          | 503           |
| 2021                                                                                                    |          | 257           |
| 2022                                                                                                    |          | 115           |
| 2023                                                                                                    |          | 41            |
| Thereafter                                                                                              |          | 15            |
| Total                                                                                                   |          | 1,739         |
| Equipment on operating leases                                                                           |          |          |
| **Property, Plant and Equipment**                                                                       |          |          |
| Equipment on operating leases, at cost                                                                  | 5,229         | 5,201         |
| Less: Accumulated depreciation                                                                          | (1,662)       | (1,639)       |
| Equipment on operating leases, net                                                                      | 3,567         | 3,562         |
| Caterpillar | Equipment on operating leases                                                             |          |          |
| **Property, Plant and Equipment**                                                                       |          |          |
| Equipment on operating leases, net                                                                      | $ 101         | $ 45          |

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Amount of lease payments to be received by lessor in third fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date.
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Amount of lease payments to be received by lessor in second fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date.
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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.
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