| **Financing Activities (Details) (USD $)In Millions, unless otherwise specified** | 3 Months Ended | 6 Months Ended |        |
|-----------------------------------------------------------------------------------|----------------|----------------|--------|
||
| Customer                                                                          |           |           |   |   |   |
| **Financing Receivable, Impaired**                                                |           |           |   |   |   |
| Recorded Investment With No Allowance Recorded                                    | $ 297          |           | $ 297  |   | $ 446 |
| Unpaid Principal Balance With No Allowance Recorded                               | 296            |           | 296    |   | 443 |
| Related Allowance With No Allowance Recorded                                      | 0              |           | 0      |   | 0 |
| Recorded Investment With An Allowance Recorded                                    | 259            |           | 259    |   | 183 |
| Unpaid Principal Balance With An Allowance Recorded                               | 258            |           | 258    |   | 178 |
| Related Allowance                                                                 | 54             |           | 54     |   | 70 |
| Recorded Investment, Total                                                        | 556            |           | 556    |   | 629 |
| Unpaid Principal Balance, Total                                                   | 554            |           | 554    |   | 621 |
| Related Allowance, Total                                                          | 54             |           | 54     |   | 70 |
| Average Recorded Investment With No Allowance Recorded                            | 359            | 378            | 396    | 376 |   |
| Interest Income Recognized With No Allowance Recorded                             | 2              | 3              | 7      | 4 |   |
| Average Recorded Investment With An Allowance Recorded                            | 196            | 248            | 190    | 239 |   |
| Interest Income Recognized With An Allowance Recorded                             | 3              | 0              | 4      | 3 |   |
| Average Recorded Investment, Total                                                | 555            | 626            | 586    | 615 |   |
| Interest Income Recognized, Total                                                 | 5              | 3              | 11     | 7 |   |
| Customer | North America                                                          |           |           |   |   |   |
| **Financing Receivable, Impaired**                                                |           |           |   |   |   |
| Recorded Investment With No Allowance Recorded                                    | 20             |           | 20     |   | 23 |
| Unpaid Principal Balance With No Allowance Recorded                               | 20             |           | 20     |   | 22 |
| Related Allowance With No Allowance Recorded                                      | 0              |           | 0      |   | 0 |
| Recorded Investment With An Allowance Recorded                                    | 15             |           | 15     |   | 13 |
| Unpaid Principal Balance With An Allowance Recorded                               | 15             |           | 15     |   | 13 |
| Related Allowance                                                                 | 7              |           | 7      |   | 4 |
| Recorded Investment, Total                                                        | 35             |           | 35     |   | 36 |
| Unpaid Principal Balance, Total                                                   | 35             |           | 35     |   | 35 |
| Related Allowance, Total                                                          | 7              |           | 7      |   | 4 |
| Average Recorded Investment With No Allowance Recorded                            | 22             | 28             | 23     | 28 |   |
| Interest Income Recognized With No Allowance Recorded                             | 0              | 2              | 1      | 3 |   |
| Average Recorded Investment With An Allowance Recorded                            | 13             | 17             | 11     | 20 |   |
| Interest Income Recognized With An Allowance Recorded                             | 0              | 0              | 0      | 0 |   |
| Average Recorded Investment, Total                                                | 35             | 45             | 34     | 48 |   |
| Interest Income Recognized, Total                                                 | 0              | 2              | 1      | 3 |   |
| Customer | Europe                                                                 |           |           |   |   |   |
| **Financing Receivable, Impaired**                                                |           |           |   |   |   |
| Recorded Investment With No Allowance Recorded                                    | 46             |           | 46     |   | 48 |
| Unpaid Principal Balance With No Allowance Recorded                               | 46             |           | 46     |   | 47 |
| Related Allowance With No Allowance Recorded                                      | 0              |           | 0      |   | 0 |
| Recorded Investment With An Allowance Recorded                                    | 14             |           | 14     |   | 20 |
| Unpaid Principal Balance With An Allowance Recorded                               | 14             |           | 14     |   | 19 |
| Related Allowance                                                                 | 5              |           | 5      |   | 7 |
| Recorded Investment, Total                                                        | 60             |           | 60     |   | 68 |
| Unpaid Principal Balance, Total                                                   | 60             |           | 60     |   | 66 |
| Related Allowance, Total                                                          | 5              |           | 5      |   | 7 |
| Average Recorded Investment With No Allowance Recorded                            | 47             | 45             | 47     | 45 |   |
| Interest Income Recognized With No Allowance Recorded                             | 0              | 0              | 0      | 0 |   |
| Average Recorded Investment With An Allowance Recorded                            | 16             | 21             | 18     | 24 |   |
| Interest Income Recognized With An Allowance Recorded                             | 0              | 0              | 0      | 1 |   |
| Average Recorded Investment, Total                                                | 63             | 66             | 65     | 69 |   |
| Interest Income Recognized, Total                                                 | 0              | 0              | 0      | 1 |   |
| Customer | Asia/Pacific                                                           |           |           |   |   |   |
| **Financing Receivable, Impaired**                                                |           |           |   |   |   |
| Recorded Investment With No Allowance Recorded                                    | 1              |           | 1      |   | 7 |
| Unpaid Principal Balance With No Allowance Recorded                               | 1              |           | 1      |   | 7 |
| Related Allowance With No Allowance Recorded                                      | 0              |           | 0      |   | 0 |
| Recorded Investment With An Allowance Recorded                                    | 17             |           | 17     |   | 17 |
| Unpaid Principal Balance With An Allowance Recorded                               | 17             |           | 17     |   | 17 |
| Related Allowance                                                                 | 4              |           | 4      |   | 2 |
| Recorded Investment, Total                                                        | 18             |           | 18     |   | 24 |
| Unpaid Principal Balance, Total                                                   | 18             |           | 18     |   | 24 |
| Related Allowance, Total                                                          | 4              |           | 4      |   | 2 |
| Average Recorded Investment With No Allowance Recorded                            | 4              | 5              | 5      | 5 |   |
| Interest Income Recognized With No Allowance Recorded                             | 0              | 0              | 0      | 0 |   |
| Average Recorded Investment With An Allowance Recorded                            | 14             | 16             | 15     | 17 |   |
| Interest Income Recognized With An Allowance Recorded                             | 1              | 0              | 1      | 1 |   |
| Average Recorded Investment, Total                                                | 18             | 21             | 20     | 22 |   |
| Interest Income Recognized, Total                                                 | 1              | 0              | 1      | 1 |   |
| Customer | Mining                                                                 |           |           |   |   |   |
| **Financing Receivable, Impaired**                                                |           |           |   |   |   |
| Recorded Investment With No Allowance Recorded                                    | 42             |           | 42     |   | 134 |
| Unpaid Principal Balance With No Allowance Recorded                               | 42             |           | 42     |   | 134 |
| Related Allowance With No Allowance Recorded                                      | 0              |           | 0      |   | 0 |
| Recorded Investment With An Allowance Recorded                                    | 114            |           | 114    |   | 0 |
| Unpaid Principal Balance With An Allowance Recorded                               | 114            |           | 114    |   | 0 |
| Related Allowance                                                                 | 11             |           | 11     |   | 0 |
| Recorded Investment, Total                                                        | 156            |           | 156    |   | 134 |
| Unpaid Principal Balance, Total                                                   | 156            |           | 156    |   | 134 |
| Related Allowance, Total                                                          | 11             |           | 11     |   | 0 |
| Average Recorded Investment With No Allowance Recorded                            | 87             | 4              | 107    | 3 |   |
| Interest Income Recognized With No Allowance Recorded                             | 1              | 0              | 3      | 0 |   |
| Average Recorded Investment With An Allowance Recorded                            | 73             | 2              | 51     | 1 |   |
| Interest Income Recognized With An Allowance Recorded                             | 2              | 0              | 2      | 0 |   |
| Average Recorded Investment, Total                                                | 160            | 6              | 158    | 4 |   |
| Interest Income Recognized, Total                                                 | 3              | 0              | 5      | 0 |   |
| Customer | Latin America                                                          |           |           |   |   |   |
| **Financing Receivable, Impaired**                                                |           |           |   |   |   |
| Recorded Investment With No Allowance Recorded                                    | 38             |           | 38     |   | 11 |
| Unpaid Principal Balance With No Allowance Recorded                               | 38             |           | 38     |   | 11 |
| Related Allowance With No Allowance Recorded                                      | 0              |           | 0      |   | 0 |
| Recorded Investment With An Allowance Recorded                                    | 10             |           | 10     |   | 23 |
| Unpaid Principal Balance With An Allowance Recorded                               | 10             |           | 10     |   | 23 |
| Related Allowance                                                                 | 3              |           | 3      |   | 6 |
| Recorded Investment, Total                                                        | 48             |           | 48     |   | 34 |
| Unpaid Principal Balance, Total                                                   | 48             |           | 48     |   | 34 |
| Related Allowance, Total                                                          | 3              |           | 3      |   | 6 |
| Average Recorded Investment With No Allowance Recorded                            | 37             | 9              | 26     | 9 |   |
| Interest Income Recognized With No Allowance Recorded                             | 0              | 0              | 0      | 0 |   |
| Average Recorded Investment With An Allowance Recorded                            | 17             | 41             | 20     | 38 |   |
| Interest Income Recognized With An Allowance Recorded                             | 0              | 0              | 0      | 1 |   |
| Average Recorded Investment, Total                                                | 54             | 50             | 46     | 47 |   |
| Interest Income Recognized, Total                                                 | 0              | 0              | 0      | 1 |   |
| Customer | Caterpillar Power Finance                                              |           |           |   |   |   |
| **Financing Receivable, Impaired**                                                |           |           |   |   |   |
| Recorded Investment With No Allowance Recorded                                    | 150            |           | 150    |   | 223 |
| Unpaid Principal Balance With No Allowance Recorded                               | 149            |           | 149    |   | 222 |
| Related Allowance With No Allowance Recorded                                      | 0              |           | 0      |   | 0 |
| Recorded Investment With An Allowance Recorded                                    | 89             |           | 89     |   | 110 |
| Unpaid Principal Balance With An Allowance Recorded                               | 88             |           | 88     |   | 106 |
| Related Allowance                                                                 | 24             |           | 24     |   | 51 |
| Recorded Investment, Total                                                        | 239            |           | 239    |   | 333 |
| Unpaid Principal Balance, Total                                                   | 237            |           | 237    |   | 328 |
| Related Allowance, Total                                                          | 24             |           | 24     |   | 51 |
| Average Recorded Investment With No Allowance Recorded                            | 162            | 287            | 188    | 286 |   |
| Interest Income Recognized With No Allowance Recorded                             | 1              | 1              | 3      | 1 |   |
| Average Recorded Investment With An Allowance Recorded                            | 63             | 151            | 75     | 139 |   |
| Interest Income Recognized With An Allowance Recorded                             | 0              | 0              | 1      | 0 |   |
| Average Recorded Investment, Total                                                | 225            | 438            | 263    | 425 |   |
| Interest Income Recognized, Total                                                 | 1              | 1              | 4      | 1 |   |
| Dealer                                                                            |           |           |   |   |   |
| **Financing Receivable, Impaired**                                                |           |           |   |   |   |
| Recorded Investment, Total                                                        | 0              |           | 0      |   | 0 |
| Average Recorded Investment, Total                                                | 0              | 0              | 0      | 0 |   |
| Caterpillar Purchased Receivables                                                 |           |           |   |   |   |
| **Financing Receivable, Impaired**                                                |           |           |   |   |   |
| Recorded Investment, Total                                                        | 0              |           | 0      |   | 0 |
| Average Recorded Investment, Total                                                | $ 0            | $ 0            | $ 0    | $ 0 |   |

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Amount of allowance for credit losses related to recorded investment.
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