| **Finance Receivables (Details 6) $ in Millions**                                                      | 3 Months Ended | 6 Months Ended |        |
|--------------------------------------------------------------------------------------------------------|----------------|----------------|--------|
||
| **Financing Receivable, Modifications**                                                                |           |           |   |   |   |
| Remaining commitments                                                                                  | $ 12           |           | $ 12   |   | $ 3 |
| **Finance receivables modified as TDRs**                                                               |           |           |   |   |   |
| Number of Contracts | contracts                                                                        | 120            | 42             | 141    | 47 |   |
| Pre-TDR Recorded Investment                                                                            | $ 183          | $ 48           | $ 235  | $ 132 |   |
| Post-TDR Recorded Investment                                                                           | $ 169          | $ 48           | $ 209  | $ 129 |   |
| **TDRs with a payment default which had been modified within twelve months prior to the default date** |           |           |   |   |   |
| Number of Contracts | contracts                                                                        | 10             | 1              | 31     | 6 |   |
| Post-TDR Recorded Investment                                                                           | $ 3            | $ 0            | $ 4    | $ 1 |   |
| Customer | North America                                                                               |           |           |   |   |   |
| **Finance receivables modified as TDRs**                                                               |           |           |   |   |   |
| Number of Contracts | contracts                                                                        | 2              | 1              | 13     | 4 |   |
| Pre-TDR Recorded Investment                                                                            | $ 6            | $ 0            | $ 16   | $ 1 |   |
| Post-TDR Recorded Investment                                                                           | $ 6            | $ 0            | $ 16   | $ 1 |   |
| **TDRs with a payment default which had been modified within twelve months prior to the default date** |           |           |   |   |   |
| Number of Contracts | contracts                                                                        | 9              | 1              | 13     | 5 |   |
| Post-TDR Recorded Investment                                                                           | $ 3            | $ 0            | $ 3    | $ 1 |   |
| Customer | Europe                                                                                      |           |           |   |   |   |
| **Finance receivables modified as TDRs**                                                               |           |           |   |   |   |
| Number of Contracts | contracts                                                                        | 3              | 19             | 3      | 19 |   |
| Pre-TDR Recorded Investment                                                                            | $ 11           | $ 2            | $ 11   | $ 2 |   |
| Post-TDR Recorded Investment                                                                           | $ 8            | $ 2            | $ 8    | $ 2 |   |
| **TDRs with a payment default which had been modified within twelve months prior to the default date** |           |           |   |   |   |
| Number of Contracts | contracts                                                                        |           |           | 13     | 0 |   |
| Post-TDR Recorded Investment                                                                           |           |           | $ 1    | $ 0 |   |
| Customer | Asia/Pacific                                                                                |           |           |   |   |   |
| **Finance receivables modified as TDRs**                                                               |           |           |   |   |   |
| Number of Contracts | contracts                                                                        | 0              | 20             | 4      | 20 |   |
| Pre-TDR Recorded Investment                                                                            | $ 0            | $ 25           | $ 3    | $ 25 |   |
| Post-TDR Recorded Investment                                                                           | $ 0            | $ 25           | $ 3    | $ 25 |   |
| **TDRs with a payment default which had been modified within twelve months prior to the default date** |           |           |   |   |   |
| Number of Contracts | contracts                                                                        |           |           | 3      | 0 |   |
| Post-TDR Recorded Investment                                                                           |           |           | $ 0    | $ 0 |   |
| Customer | Mining                                                                                      |           |           |   |   |   |
| **Finance receivables modified as TDRs**                                                               |           |           |   |   |   |
| Number of Contracts | contracts                                                                        | 1              | 0              | 1      | 0 |   |
| Pre-TDR Recorded Investment                                                                            | $ 10           | $ 0            | $ 10   | $ 0 |   |
| Post-TDR Recorded Investment                                                                           | $ 5            | $ 0            | $ 5    | $ 0 |   |
| Customer | Latin America                                                                               |           |           |   |   |   |
| **Finance receivables modified as TDRs**                                                               |           |           |   |   |   |
| Number of Contracts | contracts                                                                        | 88             | 0              | 90     | 0 |   |
| Pre-TDR Recorded Investment                                                                            | $ 12           | $ 0            | $ 12   | $ 0 |   |
| Post-TDR Recorded Investment                                                                           | $ 13           | $ 0            | $ 13   | $ 0 |   |
| **TDRs with a payment default which had been modified within twelve months prior to the default date** |           |           |   |   |   |
| Number of Contracts | contracts                                                                        | 1              | 0              | 2      | 1 |   |
| Post-TDR Recorded Investment                                                                           | $ 0            | $ 0            | $ 0    | $ 0 |   |
| Customer | Caterpillar Power Finance                                                                   |           |           |   |   |   |
| **Finance receivables modified as TDRs**                                                               |           |           |   |   |   |
| Number of Contracts | contracts                                                                        | 26             | 2              | 30     | 4 |   |
| Pre-TDR Recorded Investment                                                                            | $ 144          | $ 21           | $ 183  | $ 104 |   |
| Post-TDR Recorded Investment                                                                           | $ 137          | $ 21           | $ 164  | $ 101 |   |
| 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
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
Number of financing receivables that have been modified by troubled debt restructurings.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Post-modification amount of investment in financing receivables modified by troubled debt restructurings.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953682-111524
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953682-111524
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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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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