| **Finance Receivables (Details 3) - USD ($) $ in Millions**                           | 3 Months Ended |        |
|---------------------------------------------------------------------------------------|----------------|--------|
||
| **Receivables [Abstract]**                                                            |           |   |
| Period after which unpaid installments are considered as past due                     | 30 days        |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | $ 870          | $ 628  |
| Current                                                                               | 27,264         | 27,098 |
| Recorded Investment in Finance Receivables                                            | 28,134         | 27,726 |
| 91 Plus, Still Accruing                                                               | 32             | 26     |
| 31-60 Days Past Due                                                                   |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 203            | 156    |
| 61-90 Days Past Due                                                                   |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 206            | 70     |
| 91 Plus Days Past Due                                                                 |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 461            | 402    |
| Customer                                                                              |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Recorded Investment in Finance Receivables                                            | 20,104         | 20,032 |
| Customer | North America                                                              |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 121            | 87     |
| Current                                                                               | 8,038          | 8,031  |
| Recorded Investment in Finance Receivables                                            | 8,159          | 8,118  |
| 91 Plus, Still Accruing                                                               | 5              | 4      |
| Customer | North America | 31-60 Days Past Due                                        |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 62             | 45     |
| Customer | North America | 61-90 Days Past Due                                        |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 29             | 12     |
| Customer | North America | 91 Plus Days Past Due                                      |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 30             | 30     |
| Customer | Europe                                                                     |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 90             | 69     |
| Current                                                                               | 2,364          | 2,358  |
| Recorded Investment in Finance Receivables                                            | 2,454          | 2,427  |
| 91 Plus, Still Accruing                                                               | 12             | 9      |
| Customer | Europe | 31-60 Days Past Due                                               |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 15             | 18     |
| Customer | Europe | 61-90 Days Past Due                                               |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 11             | 7      |
| Customer | Europe | 91 Plus Days Past Due                                             |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 64             | 44     |
| Customer | Asia/Pacific                                                               |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 87             | 55     |
| Current                                                                               | 2,089          | 2,108  |
| Recorded Investment in Finance Receivables                                            | 2,176          | 2,163  |
| 91 Plus, Still Accruing                                                               | 12             | 6      |
| Customer | Asia/Pacific | 31-60 Days Past Due                                         |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 36             | 22     |
| Customer | Asia/Pacific | 61-90 Days Past Due                                         |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 22             | 12     |
| Customer | Asia/Pacific | 91 Plus Days Past Due                                       |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 29             | 21     |
| Customer | Mining                                                                     |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 91             | 75     |
| Current                                                                               | 1,691          | 1,793  |
| Recorded Investment in Finance Receivables                                            | 1,782          | 1,868  |
| 91 Plus, Still Accruing                                                               | 1              | 1      |
| Customer | Mining | 31-60 Days Past Due                                               |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 16             | 6      |
| Customer | Mining | 61-90 Days Past Due                                               |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 13             | 1      |
| Customer | Mining | 91 Plus Days Past Due                                             |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 62             | 68     |
| Customer | Latin America                                                              |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 411            | 275    |
| Current                                                                               | 1,916          | 1,998  |
| Recorded Investment in Finance Receivables                                            | 2,327          | 2,273  |
| 91 Plus, Still Accruing                                                               | 1              | 0      |
| Customer | Latin America | 31-60 Days Past Due                                        |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 54             | 45     |
| Customer | Latin America | 61-90 Days Past Due                                        |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 114            | 31     |
| Customer | Latin America | 91 Plus Days Past Due                                      |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 243            | 199    |
| Customer | Caterpillar Power Finance                                                  |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 47             | 36     |
| Current                                                                               | 3,159          | 3,147  |
| Recorded Investment in Finance Receivables                                            | 3,206          | 3,183  |
| 91 Plus, Still Accruing                                                               | 0              | 2      |
| Customer | Caterpillar Power Finance | 31-60 Days Past Due                            |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 5              | 0      |
| Customer | Caterpillar Power Finance | 61-90 Days Past Due                            |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 14             | 1      |
| Customer | Caterpillar Power Finance | 91 Plus Days Past Due                          |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 28             | 35     |
| Dealer                                                                                |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Recorded Investment in Finance Receivables                                            | 5,101          | 5,093  |
| Dealer | North America                                                                |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Current                                                                               | 3,358          | 3,387  |
| Recorded Investment in Finance Receivables                                            | 3,358          | 3,387  |
| 91 Plus, Still Accruing                                                               | 0              | 0      |
| Dealer | North America | 31-60 Days Past Due                                          |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | North America | 61-90 Days Past Due                                          |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | North America | 91 Plus Days Past Due                                        |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Europe                                                                       |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Current                                                                               | 329            | 330    |
| Recorded Investment in Finance Receivables                                            | 329            | 330    |
| 91 Plus, Still Accruing                                                               | 0              | 0      |
| Dealer | Europe | 31-60 Days Past Due                                                 |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Europe | 61-90 Days Past Due                                                 |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Europe | 91 Plus Days Past Due                                               |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Asia/Pacific                                                                 |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Current                                                                               | 676            | 611    |
| Recorded Investment in Finance Receivables                                            | 676            | 611    |
| 91 Plus, Still Accruing                                                               | 0              | 0      |
| Dealer | Asia/Pacific | 31-60 Days Past Due                                           |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Asia/Pacific | 61-90 Days Past Due                                           |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Asia/Pacific | 91 Plus Days Past Due                                         |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Mining                                                                       |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Current                                                                               | 8              | 4      |
| Recorded Investment in Finance Receivables                                            | 8              | 4      |
| 91 Plus, Still Accruing                                                               | 0              | 0      |
| Dealer | Mining | 31-60 Days Past Due                                                 |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Mining | 61-90 Days Past Due                                                 |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Mining | 91 Plus Days Past Due                                               |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Latin America                                                                |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Current                                                                               | 727            | 758    |
| Recorded Investment in Finance Receivables                                            | 727            | 758    |
| 91 Plus, Still Accruing                                                               | 0              | 0      |
| Dealer | Latin America | 31-60 Days Past Due                                          |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Latin America | 61-90 Days Past Due                                          |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Latin America | 91 Plus Days Past Due                                        |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Caterpillar Power Finance                                                    |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Current                                                                               | 3              | 3      |
| Recorded Investment in Finance Receivables                                            | 3              | 3      |
| 91 Plus, Still Accruing                                                               | 0              | 0      |
| Dealer | Caterpillar Power Finance | 31-60 Days Past Due                              |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Caterpillar Power Finance | 61-90 Days Past Due                              |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Dealer | Caterpillar Power Finance | 91 Plus Days Past Due                            |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Caterpillar Purchased Receivables                                                     |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Recorded Investment in Finance Receivables                                            | 2,929          | 2,601  |
| Caterpillar Purchased Receivables | North America                                     |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 17             | 22     |
| Current                                                                               | 1,651          | 1,386  |
| Recorded Investment in Finance Receivables                                            | 1,668          | 1,408  |
| 91 Plus, Still Accruing                                                               | 1              | 1      |
| Caterpillar Purchased Receivables | North America | 31-60 Days Past Due               |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 13             | 16     |
| Caterpillar Purchased Receivables | North America | 61-90 Days Past Due               |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 3              | 5      |
| Caterpillar Purchased Receivables | North America | 91 Plus Days Past Due             |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 1              | 1      |
| Caterpillar Purchased Receivables | Europe                                            |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 5              | 8      |
| Current                                                                               | 368            | 307    |
| Recorded Investment in Finance Receivables                                            | 373            | 315    |
| 91 Plus, Still Accruing                                                               | 0              | 3      |
| Caterpillar Purchased Receivables | Europe | 31-60 Days Past Due                      |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 1              | 4      |
| Caterpillar Purchased Receivables | Europe | 61-90 Days Past Due                      |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Caterpillar Purchased Receivables | Europe | 91 Plus Days Past Due                    |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 4              | 4      |
| Caterpillar Purchased Receivables | Asia/Pacific                                      |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 1              | 0      |
| Current                                                                               | 470            | 407    |
| Recorded Investment in Finance Receivables                                            | 471            | 407    |
| 91 Plus, Still Accruing                                                               | 0              | 0      |
| Caterpillar Purchased Receivables | Asia/Pacific | 31-60 Days Past Due                |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 1              | 0      |
| Caterpillar Purchased Receivables | Asia/Pacific | 61-90 Days Past Due                |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Caterpillar Purchased Receivables | Asia/Pacific | 91 Plus Days Past Due              |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Caterpillar Purchased Receivables | Mining                                            |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Current                                                                               | 0              | 0      |
| Recorded Investment in Finance Receivables                                            | 0              | 0      |
| 91 Plus, Still Accruing                                                               | 0              | 0      |
| Caterpillar Purchased Receivables | Mining | 31-60 Days Past Due                      |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Caterpillar Purchased Receivables | Mining | 61-90 Days Past Due                      |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Caterpillar Purchased Receivables | Mining | 91 Plus Days Past Due                    |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Caterpillar Purchased Receivables | Latin America                                     |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Current                                                                               | 411            | 454    |
| Recorded Investment in Finance Receivables                                            | 411            | 454    |
| 91 Plus, Still Accruing                                                               | 0              | 0      |
| Caterpillar Purchased Receivables | Latin America | 31-60 Days Past Due               |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Caterpillar Purchased Receivables | Latin America | 61-90 Days Past Due               |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Caterpillar Purchased Receivables | Latin America | 91 Plus Days Past Due             |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Caterpillar Purchased Receivables | Caterpillar Power Finance                         |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 1      |
| Current                                                                               | 6              | 16     |
| Recorded Investment in Finance Receivables                                            | 6              | 17     |
| 91 Plus, Still Accruing                                                               | 0              | 0      |
| Caterpillar Purchased Receivables | Caterpillar Power Finance | 31-60 Days Past Due   |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 0      |
| Caterpillar Purchased Receivables | Caterpillar Power Finance | 61-90 Days Past Due   |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | 0              | 1      |
| Caterpillar Purchased Receivables | Caterpillar Power Finance | 91 Plus Days Past Due |           |   |
| **Financing Receivable, Recorded Investment, Past Due**                               |           |   |
| Past Due                                                                              | $ 0            | $ 0    |

| X                                                                                                                                                                                                                                                                                                                                                          |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Recorded investment in financing receivables that are 91 days or more past due and still accruing.
+ References
No definition available.
+ Details**Name:**cfsc_FinancingReceivableRecordedInvestment91DaysPastDueAndStillAccruing**Namespace Prefix:**cfsc_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                      |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the period after which the unpaid contractual payments are considered as past due.
+ References
No definition available.
+ Details**Name:**cfsc_PeriodAfterWhichUnpaidInstallmentsAreConsideredAsPastDue**Namespace Prefix:**cfsc_**Data Type:**xbrli:durationItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                            |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - References
No definition available.
+ Details**Name:**us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Financing receivables that are current.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953401-111524
+ Details**Name:**us-gaap_FinancingReceivableRecordedInvestmentCurrent**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Recorded Investment in financing receivables that are past due at the balance sheet date.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953401-111524
+ Details**Name:**us-gaap_FinancingReceivableRecordedInvestmentPastDue**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524
+ Details**Name:**us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                             |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - References
No definition available.
+ Details**Name:**us-gaap_ReceivablesAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                      |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FinancingReceivablesPeriodPastDueAxis=cfsc_FinancingReceivables31to60DaysPastDueMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                      |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FinancingReceivablesPeriodPastDueAxis=cfsc_FinancingReceivables61to90DaysPastDueMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                                    |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FinancingReceivablesPeriodPastDueAxis=cfsc_FinancingReceivablesEqualtoGreaterthan91DaysPastDueMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FinancingReceivablePortfolioSegmentAxis=cfsc_CustomerMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_NorthAmericaMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                        |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_EMEAMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                               |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_AsiaPacificMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                       |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cfsc_MiningMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_LatinAmericaMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                                        |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cfsc_CaterpillarPowerFinanceMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                         |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FinancingReceivablePortfolioSegmentAxis=cfsc_DealerMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                  |
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