| **Finance Receivables (Details 7) $ in Millions**                                                      | 3 Months Ended |
|--------------------------------------------------------------------------------------------------------|----------------|
||
| Customer                                                                                               |           |   |
| **Finance receivables modified as TDRs**                                                               |           |   |
| Pre-TDR Amortized Cost                                                                                 |           | $ 7 |
| Post-TDR Amortized Cost                                                                                |           | 7 |
| Customer | EAME                                                                                        |           |   |
| **Finance receivables modified as TDRs**                                                               |           |   |
| Pre-TDR Amortized Cost                                                                                 |           | 1 |
| Post-TDR Amortized Cost                                                                                |           | 1 |
| Customer | Mining                                                                                      |           |   |
| **TDRs with a payment default which had been modified within twelve months prior to the default date** |           |   |
| Post-TDR Amortized Cost                                                                                |           | 5 |
| Customer | Power Finance                                                                               |           |   |
| **Finance receivables modified as TDRs**                                                               |           |   |
| Pre-TDR Amortized Cost                                                                                 |           | 6 |
| Post-TDR Amortized Cost                                                                                |           | $ 6 |
| Dealer                                                                                                 |           |   |
| **Finance receivables modified as TDRs**                                                               |           |   |
| Number of Contracts | contracts                                                                        | 0              | 0 |
| Caterpillar Purchased Receivables                                                                      |           |   |
| **Finance receivables modified as TDRs**                                                               |           |   |
| Number of Contracts | contracts                                                                        | 0              | 0 |

| X                                                                                                                                                                                                                                                                                         |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Loan and finance lease receivables modified as TDRs
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                            |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Loans and leases modified as TDRs within previous twelve months that subsequently defaulted
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of financing receivables that have been modified by troubled debt restructurings.
+ References
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount, after troubled debt restructuring, of modified financing receivable.
+ References
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount, before troubled debt restructuring, of financing receivable to be modified.
+ References
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default.
+ References
Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524
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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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