| **Finance Receivables (Details 5) - USD ($) $ in Millions** | 12 Months Ended |
|-------------------------------------------------------------|-----------------|
||
| Customer                                                    |            |   |   |
| **Financing Receivable, Impaired**                          |            |   |   |
| Recorded Investment With No Allowance Recorded              | $ 408           | $ 252 |   |
| Unpaid Principal Balance With No Allowance Recorded         | 407             | 250 |   |
| Related Allowance With No Allowance Recorded                | 0               | 0 |   |
| Recorded Investment With An Allowance Recorded              | 193             | 362 |   |
| Unpaid Principal Balance With An Allowance Recorded         | 191             | 360 |   |
| Related Allowance                                           | 65              | 75 |   |
| Recorded Investment, Total                                  | 601             | 614 |   |
| Unpaid Principal Balance, Total                             | 598             | 610 |   |
| Related Allowance, Total                                    | 65              | 75 |   |
| Average Recorded Investment With No Allowance Recorded      | 332             | 333 | $ 421 |
| Interest Income Recognized With No Allowance Recorded       | 10              | 11 | 12 |
| Average Recorded Investment With An Allowance Recorded      | 277             | 275 | 246 |
| Interest Income Recognized With An Allowance Recorded       | 10              | 12 | 6 |
| Average Recorded Investment, Total                          | 609             | 608 | 667 |
| Interest Income Recognized, Total                           | 20              | 23 | 18 |
| Customer | North America                                    |            |   |   |
| **Financing Receivable, Impaired**                          |            |   |   |
| Recorded Investment With No Allowance Recorded              | 12              | 14 |   |
| Unpaid Principal Balance With No Allowance Recorded         | 12              | 14 |   |
| Related Allowance With No Allowance Recorded                | 0               | 0 |   |
| Recorded Investment With An Allowance Recorded              | 14              | 6 |   |
| Unpaid Principal Balance With An Allowance Recorded         | 13              | 6 |   |
| Related Allowance                                           | 4               | 1 |   |
| Recorded Investment, Total                                  | 26              | 20 |   |
| Unpaid Principal Balance, Total                             | 25              | 20 |   |
| Related Allowance, Total                                    | 4               | 1 |   |
| Average Recorded Investment With No Allowance Recorded      | 12              | 20 | 25 |
| Interest Income Recognized With No Allowance Recorded       | 1               | 1 | 3 |
| Average Recorded Investment With An Allowance Recorded      | 9               | 9 | 18 |
| Interest Income Recognized With An Allowance Recorded       | 0               | 0 | 1 |
| Average Recorded Investment, Total                          | 21              | 29 | 43 |
| Interest Income Recognized, Total                           | 1               | 1 | 4 |
| Customer | Europe                                           |            |   |   |
| **Financing Receivable, Impaired**                          |            |   |   |
| Recorded Investment With No Allowance Recorded              | 41              | 44 |   |
| Unpaid Principal Balance With No Allowance Recorded         | 41              | 43 |   |
| Related Allowance With No Allowance Recorded                | 0               | 0 |   |
| Recorded Investment With An Allowance Recorded              | 11              | 12 |   |
| Unpaid Principal Balance With An Allowance Recorded         | 10              | 12 |   |
| Related Allowance                                           | 5               | 4 |   |
| Recorded Investment, Total                                  | 52              | 56 |   |
| Unpaid Principal Balance, Total                             | 51              | 55 |   |
| Related Allowance, Total                                    | 5               | 4 |   |
| Average Recorded Investment With No Allowance Recorded      | 42              | 47 | 49 |
| Interest Income Recognized With No Allowance Recorded       | 1               | 1 | 1 |
| Average Recorded Investment With An Allowance Recorded      | 14              | 21 | 22 |
| Interest Income Recognized With An Allowance Recorded       | 1               | 1 | 1 |
| Average Recorded Investment, Total                          | 56              | 68 | 71 |
| Interest Income Recognized, Total                           | 2               | 2 | 2 |
| Customer | Asia/Pacific                                     |            |   |   |
| **Financing Receivable, Impaired**                          |            |   |   |
| Recorded Investment With No Allowance Recorded              | 1               | 2 |   |
| Unpaid Principal Balance With No Allowance Recorded         | 1               | 2 |   |
| Related Allowance With No Allowance Recorded                | 0               | 0 |   |
| Recorded Investment With An Allowance Recorded              | 34              | 29 |   |
| Unpaid Principal Balance With An Allowance Recorded         | 34              | 29 |   |
| Related Allowance                                           | 4               | 8 |   |
| Recorded Investment, Total                                  | 35              | 31 |   |
| Unpaid Principal Balance, Total                             | 35              | 31 |   |
| Related Allowance, Total                                    | 4               | 8 |   |
| Average Recorded Investment With No Allowance Recorded      | 2               | 3 | 4 |
| Interest Income Recognized With No Allowance Recorded       | 0               | 0 | 0 |
| Average Recorded Investment With An Allowance Recorded      | 44              | 23 | 18 |
| Interest Income Recognized With An Allowance Recorded       | 2               | 1 | 1 |
| Average Recorded Investment, Total                          | 46              | 26 | 22 |
| Interest Income Recognized, Total                           | 2               | 1 | 1 |
| Customer | Mining                                           |            |   |   |
| **Financing Receivable, Impaired**                          |            |   |   |
| Recorded Investment With No Allowance Recorded              | 84              | 29 |   |
| Unpaid Principal Balance With No Allowance Recorded         | 84              | 29 |   |
| Related Allowance With No Allowance Recorded                | 0               | 0 |   |
| Recorded Investment With An Allowance Recorded              | 11              | 138 |   |
| Unpaid Principal Balance With An Allowance Recorded         | 11              | 137 |   |
| Related Allowance                                           | 3               | 9 |   |
| Recorded Investment, Total                                  | 95              | 167 |   |
| Unpaid Principal Balance, Total                             | 95              | 166 |   |
| Related Allowance, Total                                    | 3               | 9 |   |
| Average Recorded Investment With No Allowance Recorded      | 75              | 69 | 61 |
| Interest Income Recognized With No Allowance Recorded       | 3               | 3 | 3 |
| Average Recorded Investment With An Allowance Recorded      | 39              | 90 | 1 |
| Interest Income Recognized With An Allowance Recorded       | 1               | 7 | 0 |
| Average Recorded Investment, Total                          | 114             | 159 | 62 |
| Interest Income Recognized, Total                           | 4               | 10 | 3 |
| Customer | Latin America                                    |            |   |   |
| **Financing Receivable, Impaired**                          |            |   |   |
| Recorded Investment With No Allowance Recorded              | 28              | 34 |   |
| Unpaid Principal Balance With No Allowance Recorded         | 28              | 34 |   |
| Related Allowance With No Allowance Recorded                | 0               | 0 |   |
| Recorded Investment With An Allowance Recorded              | 53              | 42 |   |
| Unpaid Principal Balance With An Allowance Recorded         | 53              | 42 |   |
| Related Allowance                                           | 21              | 12 |   |
| Recorded Investment, Total                                  | 81              | 76 |   |
| Unpaid Principal Balance, Total                             | 81              | 76 |   |
| Related Allowance, Total                                    | 21              | 12 |   |
| Average Recorded Investment With No Allowance Recorded      | 31              | 30 | 11 |
| Interest Income Recognized With No Allowance Recorded       | 0               | 0 | 0 |
| Average Recorded Investment With An Allowance Recorded      | 56              | 36 | 52 |
| Interest Income Recognized With An Allowance Recorded       | 3               | 1 | 2 |
| Average Recorded Investment, Total                          | 87              | 66 | 63 |
| Interest Income Recognized, Total                           | 3               | 1 | 2 |
| Customer | Caterpillar Power Finance                        |            |   |   |
| **Financing Receivable, Impaired**                          |            |   |   |
| Recorded Investment With No Allowance Recorded              | 242             | 129 |   |
| Unpaid Principal Balance With No Allowance Recorded         | 241             | 128 |   |
| Related Allowance With No Allowance Recorded                | 0               | 0 |   |
| Recorded Investment With An Allowance Recorded              | 70              | 135 |   |
| Unpaid Principal Balance With An Allowance Recorded         | 70              | 134 |   |
| Related Allowance                                           | 28              | 41 |   |
| Recorded Investment, Total                                  | 312             | 264 |   |
| Unpaid Principal Balance, Total                             | 311             | 262 |   |
| Related Allowance, Total                                    | 28              | 41 |   |
| Average Recorded Investment With No Allowance Recorded      | 170             | 164 | 271 |
| Interest Income Recognized With No Allowance Recorded       | 5               | 6 | 5 |
| Average Recorded Investment With An Allowance Recorded      | 115             | 96 | 135 |
| Interest Income Recognized With An Allowance Recorded       | 3               | 2 | 1 |
| Average Recorded Investment, Total                          | 285             | 260 | 406 |
| Interest Income Recognized, Total                           | 8               | 8 | 6 |
| Dealer                                                      |            |   |   |
| **Financing Receivable, Impaired**                          |            |   |   |
| Recorded Investment, Total                                  | $ 0             | $ 0 | $ 0 |
| Average Recorded Investment, Total                          |                 |  |  |
| Caterpillar Purchased Receivables                           |            |   |   |
| **Financing Receivable, Impaired**                          |            |   |   |
| Recorded Investment, Total                                  | $ 0             | $ 0 | $ 0 |
| Average Recorded Investment, Total                          |                 |  |  |

| X                                                                                                                                                                                                                                                                                                         |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of allowance for credit losses related to recorded investment.
+ References
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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
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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| - Definition
Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.
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| - Definition
Amount of allowance for credit losses related to recorded investment.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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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Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.
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Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.
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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.
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Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.
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| - Definition
Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.
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