| **Finance Receivables (Details 4) - USD ($) $ in Millions**                  | 3 Months Ended |        |
|------------------------------------------------------------------------------|----------------|--------|
||
| **Receivables [Abstract]**                                                   |           |   |   |
| Period after which collection of future income is considered as not probable | 120 days       |   |   |
| Customer                                                                     |           |   |   |
| **Financing Receivable, Impaired**                                           |           |   |   |
| Recorded Investment With No Allowance Recorded                               | $ 437          |   | $ 408 |
| Unpaid Principal Balance With No Allowance Recorded                          | 436            |   | 407 |
| Related Allowance With No Allowance Recorded                                 | 0              |   | 0 |
| Recorded Investment With An Allowance Recorded                               | 169            |   | 193 |
| Unpaid Principal Balance With An Allowance Recorded                          | 167            |   | 191 |
| Related Allowance With An Allowance Recorded                                 | 58             |   | 65 |
| Recorded Investment, Total                                                   | 606            |   | 601 |
| Unpaid Principal Balance, Total                                              | 603            |   | 598 |
| Related Allowance, Total                                                     | 58             |   | 65 |
| Average Recorded Investment With No Allowance Recorded                       | 417            | $ 331  |   |
| Interest Income Recognized With No Allowance Recorded                        | 4              | 3      |   |
| Average Recorded Investment With An Allowance Recorded                       | 180            | 283    |   |
| Interest Income Recognized With An Allowance Recorded                        | 2              | 2      |   |
| Average Recorded Investment, Total                                           | 597            | 614    |   |
| Interest Income Recognized, Total                                            | 6              | 5      |   |
| Customer | North America                                                     |           |   |   |
| **Financing Receivable, Impaired**                                           |           |   |   |
| Recorded Investment With No Allowance Recorded                               | 20             |   | 12 |
| Unpaid Principal Balance With No Allowance Recorded                          | 20             |   | 12 |
| Related Allowance With No Allowance Recorded                                 | 0              |   | 0 |
| Recorded Investment With An Allowance Recorded                               | 15             |   | 14 |
| Unpaid Principal Balance With An Allowance Recorded                          | 13             |   | 13 |
| Related Allowance With An Allowance Recorded                                 | 4              |   | 4 |
| Recorded Investment, Total                                                   | 35             |   | 26 |
| Unpaid Principal Balance, Total                                              | 33             |   | 25 |
| Related Allowance, Total                                                     | 4              |   | 4 |
| Average Recorded Investment With No Allowance Recorded                       | 14             | 14     |   |
| Interest Income Recognized With No Allowance Recorded                        | 0              | 0      |   |
| Average Recorded Investment With An Allowance Recorded                       | 14             | 6      |   |
| Interest Income Recognized With An Allowance Recorded                        | 0              | 0      |   |
| Average Recorded Investment, Total                                           | 28             | 20     |   |
| Interest Income Recognized, Total                                            | 0              | 0      |   |
| Customer | Europe                                                            |           |   |   |
| **Financing Receivable, Impaired**                                           |           |   |   |
| Recorded Investment With No Allowance Recorded                               | 39             |   | 41 |
| Unpaid Principal Balance With No Allowance Recorded                          | 39             |   | 41 |
| Related Allowance With No Allowance Recorded                                 | 0              |   | 0 |
| Recorded Investment With An Allowance Recorded                               | 11             |   | 11 |
| Unpaid Principal Balance With An Allowance Recorded                          | 11             |   | 10 |
| Related Allowance With An Allowance Recorded                                 | 6              |   | 5 |
| Recorded Investment, Total                                                   | 50             |   | 52 |
| Unpaid Principal Balance, Total                                              | 50             |   | 51 |
| Related Allowance, Total                                                     | 6              |   | 5 |
| Average Recorded Investment With No Allowance Recorded                       | 40             | 44     |   |
| Interest Income Recognized With No Allowance Recorded                        | 0              | 0      |   |
| Average Recorded Investment With An Allowance Recorded                       | 12             | 14     |   |
| Interest Income Recognized With An Allowance Recorded                        | 0              | 0      |   |
| Average Recorded Investment, Total                                           | 52             | 58     |   |
| Interest Income Recognized, Total                                            | 0              | 0      |   |
| Customer | Asia/Pacific                                                      |           |   |   |
| **Financing Receivable, Impaired**                                           |           |   |   |
| Recorded Investment With No Allowance Recorded                               | 4              |   | 1 |
| Unpaid Principal Balance With No Allowance Recorded                          | 4              |   | 1 |
| Related Allowance With No Allowance Recorded                                 | 0              |   | 0 |
| Recorded Investment With An Allowance Recorded                               | 35             |   | 34 |
| Unpaid Principal Balance With An Allowance Recorded                          | 35             |   | 34 |
| Related Allowance With An Allowance Recorded                                 | 5              |   | 4 |
| Recorded Investment, Total                                                   | 39             |   | 35 |
| Unpaid Principal Balance, Total                                              | 39             |   | 35 |
| Related Allowance, Total                                                     | 5              |   | 4 |
| Average Recorded Investment With No Allowance Recorded                       | 2              | 4      |   |
| Interest Income Recognized With No Allowance Recorded                        | 0              | 0      |   |
| Average Recorded Investment With An Allowance Recorded                       | 33             | 26     |   |
| Interest Income Recognized With An Allowance Recorded                        | 1              | 0      |   |
| Average Recorded Investment, Total                                           | 35             | 30     |   |
| Interest Income Recognized, Total                                            | 1              | 0      |   |
| Customer | Mining                                                            |           |   |   |
| **Financing Receivable, Impaired**                                           |           |   |   |
| Recorded Investment With No Allowance Recorded                               | 79             |   | 84 |
| Unpaid Principal Balance With No Allowance Recorded                          | 79             |   | 84 |
| Related Allowance With No Allowance Recorded                                 | 0              |   | 0 |
| Recorded Investment With An Allowance Recorded                               | 11             |   | 11 |
| Unpaid Principal Balance With An Allowance Recorded                          | 11             |   | 11 |
| Related Allowance With An Allowance Recorded                                 | 4              |   | 3 |
| Recorded Investment, Total                                                   | 90             |   | 95 |
| Unpaid Principal Balance, Total                                              | 90             |   | 95 |
| Related Allowance, Total                                                     | 4              |   | 3 |
| Average Recorded Investment With No Allowance Recorded                       | 81             | 102    |   |
| Interest Income Recognized With No Allowance Recorded                        | 1              | 2      |   |
| Average Recorded Investment With An Allowance Recorded                       | 11             | 63     |   |
| Interest Income Recognized With An Allowance Recorded                        | 0              | 1      |   |
| Average Recorded Investment, Total                                           | 92             | 165    |   |
| Interest Income Recognized, Total                                            | 1              | 3      |   |
| Customer | Latin America                                                     |           |   |   |
| **Financing Receivable, Impaired**                                           |           |   |   |
| Recorded Investment With No Allowance Recorded                               | 27             |   | 28 |
| Unpaid Principal Balance With No Allowance Recorded                          | 27             |   | 28 |
| Related Allowance With No Allowance Recorded                                 | 0              |   | 0 |
| Recorded Investment With An Allowance Recorded                               | 53             |   | 53 |
| Unpaid Principal Balance With An Allowance Recorded                          | 53             |   | 53 |
| Related Allowance With An Allowance Recorded                                 | 22             |   | 21 |
| Recorded Investment, Total                                                   | 80             |   | 81 |
| Unpaid Principal Balance, Total                                              | 80             |   | 81 |
| Related Allowance, Total                                                     | 22             |   | 21 |
| Average Recorded Investment With No Allowance Recorded                       | 27             | 32     |   |
| Interest Income Recognized With No Allowance Recorded                        | 0              | 0      |   |
| Average Recorded Investment With An Allowance Recorded                       | 51             | 46     |   |
| Interest Income Recognized With An Allowance Recorded                        | 1              | 1      |   |
| Average Recorded Investment, Total                                           | 78             | 78     |   |
| Interest Income Recognized, Total                                            | 1              | 1      |   |
| Customer | Caterpillar Power Finance                                         |           |   |   |
| **Financing Receivable, Impaired**                                           |           |   |   |
| Recorded Investment With No Allowance Recorded                               | 268            |   | 242 |
| Unpaid Principal Balance With No Allowance Recorded                          | 267            |   | 241 |
| Related Allowance With No Allowance Recorded                                 | 0              |   | 0 |
| Recorded Investment With An Allowance Recorded                               | 44             |   | 70 |
| Unpaid Principal Balance With An Allowance Recorded                          | 44             |   | 70 |
| Related Allowance With An Allowance Recorded                                 | 17             |   | 28 |
| Recorded Investment, Total                                                   | 312            |   | 312 |
| Unpaid Principal Balance, Total                                              | 311            |   | 311 |
| Related Allowance, Total                                                     | 17             |   | 28 |
| Average Recorded Investment With No Allowance Recorded                       | 253            | 135    |   |
| Interest Income Recognized With No Allowance Recorded                        | 3              | 1      |   |
| Average Recorded Investment With An Allowance Recorded                       | 59             | 128    |   |
| Interest Income Recognized With An Allowance Recorded                        | 0              | 0      |   |
| Average Recorded Investment, Total                                           | 312            | 263    |   |
| Interest Income Recognized, Total                                            | 3              | $ 1    |   |
| Dealer                                                                       |           |   |   |
| **Financing Receivable, Impaired**                                           |           |   |   |
| Recorded Investment, Total                                                   | 0              |   | 0 |
| Caterpillar Purchased Receivables                                            |           |   |   |
| **Financing Receivable, Impaired**                                           |           |   |   |
| Recorded Investment, Total                                                   | $ 0            |   | $ 0 |

| X                                                                                                                                                                                                                                                                                                         |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of allowance for credit losses related to recorded investment.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the period after which collection of future income is considered as not probable.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                            |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of allowance for credit losses related to recorded investment.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of interest income, recognized on cash basis, on financing receivables, for which there is no related allowance for credit losses and are recognized as impaired.
+ References
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| - Definition
Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of interest income on financing receivables, for which there is a related allowance for credit losses, recognized on a cash-basis method of accounting that the financing receivables were impaired.
+ References
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| - Definition
Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.
+ References
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| X                                                                                                                                                                                             |
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No definition available.
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| X                                                                                                                                                           |
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| X                                                                                                                                                                                                |
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| X                                                                                                                                                                                        |
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| X                                                                                                                                                                                               |
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| X                                                                                                                                                                                       |
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| X                                                                                                                                                                                                |
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| X                                                                                                                                                                                                        |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                         |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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