| **Finance Receivables (Details 3) - USD ($) $ in Millions** | 12 Months Ended |
|-------------------------------------------------------------|-----------------|
||
| **Financing Receivable, Allowance for Credit Losses**       |            |   |
| Beginning Balance                                           | $ 337           | $ 479 |
| Write-offs                                                  | (108)           | (256) |
| Recoveries                                                  | 62              | 51 |
| Provision for credit losses(1)                              | 58              | 68 |
| Other                                                       | (3)             | (5) |
| Ending Balance(2)                                           | 346             | 337 |
| Finance Receivables                                         | 26,787          | 27,514 |
| Customer                                                    |            |   |
| **Financing Receivable, Allowance for Credit Losses**       |            |   |
| Beginning Balance                                           | 251             | 431 |
| Write-offs                                                  | (108)           | (256) |
| Recoveries                                                  | 62              | 51 |
| Provision for credit losses(1)                              | 75              | 30 |
| Other                                                       | (3)             | (5) |
| Ending Balance(2)                                           | 277             | 251 |
| Finance Receivables                                         | 20,353          | 20,842 |
| Dealer                                                      |            |   |
| **Financing Receivable, Allowance for Credit Losses**       |            |   |
| Beginning Balance                                           | 82              | 44 |
| Write-offs                                                  | 0               | 0 |
| Recoveries                                                  | 0               | 0 |
| Provision for credit losses(1)                              | (17)            | 38 |
| Other                                                       | 0               | 0 |
| Ending Balance(2)                                           | 65              | 82 |
| Finance Receivables                                         | 2,137           | 2,210 |
| Caterpillar Purchased Receivables                           |            |   |
| **Financing Receivable, Allowance for Credit Losses**       |            |   |
| Beginning Balance                                           | 4               | 4 |
| Write-offs                                                  | 0               | 0 |
| Recoveries                                                  | 0               | 0 |
| Provision for credit losses(1)                              | 0               | 0 |
| Other                                                       | 0               | 0 |
| Ending Balance(2)                                           | 4               | 4 |
| Finance Receivables                                         | $ 4,297         | $ 4,462 |

| X                                                                                                                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Financing Receivable, Allowance for Credit Losses, Other
+ References
No definition available.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of increase in allowance for credit loss on financing receivable from recovery.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                    |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.
+ References
No definition available.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of writeoff of financing receivable, charged against allowance for credit loss.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of credit loss expense (reversal of expense) for financing receivable.
+ References
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| X                                                                                                                                                                                  |
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