| **Financing Activities (Details 4) (USD $)In Millions, unless otherwise specified** | Mar. 31, 2015                                                                                                                                                                                                                                                                                                                                     | Dec. 31, 2014                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | $ 28,409us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome                                                                                                                                                                                                                                                                                       | $ 29,475us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome                                                                                                                                                                                                                                                                                       |
| Performing                                                                          |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 27,806us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                                                                                                      | 29,003us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                                                                                                      |
| Nonperforming                                                                       |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 603us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                                                                                                      | 472us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                                                                                                      |
| North America                                                                       |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 12,637us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember                                                                                                                                                                                                                       | 12,526us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember                                                                                                                                                                                                                       |
| North America | Performing                                                          |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 12,606us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                                    | 12,499us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                                    |
| North America | Nonperforming                                                       |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 31us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                                     | 27us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                                     |
| Europe                                                                              |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,306us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                                                                                                                                                                                                                                | 3,581us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                                                                                                                                                                                                                                |
| Europe | Performing                                                                 |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,258us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                                             | 3,549us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                                             |
| Europe | Nonperforming                                                              |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 48us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                                             | 32us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                                             |
| Asia/Pacific                                                                        |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,669us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember                                                                                                                                                                                                                         | 3,931us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember                                                                                                                                                                                                                         |
| Asia/Pacific | Performing                                                           |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,625us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                                      | 3,877us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                                      |
| Asia/Pacific | Nonperforming                                                        |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 44us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                                      | 54us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                                      |
| Mining                                                                              |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 1,992us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember                                                                                                                                                                                                                                 | 2,126us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember                                                                                                                                                                                                                                 |
| Mining | Performing                                                                 |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 1,868us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                                              | 2,064us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                                              |
| Mining | Nonperforming                                                              |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 124us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                                             | 62us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                                              |
| Latin America                                                                       |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,629us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember                                                                                                                                                                                                                        | 4,141us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember                                                                                                                                                                                                                        |
| Latin America | Performing                                                          |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,416us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                                     | 3,940us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                                     |
| Latin America | Nonperforming                                                       |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 213us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                                    | 201us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                                    |
| Caterpillar Power Finance                                                           |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,176us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember                                                                                                                                                                                                                | 3,170us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember                                                                                                                                                                                                                |
| Caterpillar Power Finance | Performing                                              |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,033us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                             | 3,074us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                                             |
| Caterpillar Power Finance | Nonperforming                                           |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 143us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                            | 96us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                                             |
| Customer                                                                            |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 20,196us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember                                                                                                                                                                                     | 21,068us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember                                                                                                                                                                                     |
| Customer | Performing                                                               |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 19,598us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                  | 20,600us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                  |
| Customer | Nonperforming                                                            |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 598us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                  | 468us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                  |
| Customer | North America                                                            |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 7,423us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember                                                                                                                    | 7,372us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember                                                                                                                    |
| Customer | North America | Performing                                               |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 7,392us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                 | 7,345us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                 |
| Customer | North America | Nonperforming                                            |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 31us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                 | 27us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                 |
| Customer | Europe                                                                   |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 2,419us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                                                                                                                            | 2,675us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                                                                                                                            |
| Customer | Europe | Performing                                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 2,376us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                         | 2,647us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                         |
| Customer | Europe | Nonperforming                                                   |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 43us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                         | 28us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                         |
| Customer | Asia/Pacific                                                             |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 2,687us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember                                                                                                                     | 2,893us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember                                                                                                                     |
| Customer | Asia/Pacific | Performing                                                |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 2,643us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                  | 2,839us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                  |
| Customer | Asia/Pacific | Nonperforming                                             |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 44us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                  | 54us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                  |
| Customer | Mining                                                                   |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 1,989us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember                                                                                                                             | 2,123us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember                                                                                                                             |
| Customer | Mining | Performing                                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 1,865us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                          | 2,061us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                          |
| Customer | Mining | Nonperforming                                                   |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 124us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                         | 62us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                          |
| Customer | Latin America                                                            |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 2,518us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember                                                                                                                    | 2,857us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember                                                                                                                    |
| Customer | Latin America | Performing                                               |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 2,305us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                 | 2,656us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                 |
| Customer | Latin America | Nonperforming                                            |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 213us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                | 201us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                |
| Customer | Caterpillar Power Finance                                                |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,160us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember                                                                                                            | 3,148us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember                                                                                                            |
| Customer | Caterpillar Power Finance | Performing                                   |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,017us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                         | 3,052us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                         |
| Customer | Caterpillar Power Finance | Nonperforming                                |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 143us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                        | 96us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                         |
| Dealer                                                                              |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 5,130us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember                                                                                                                                                                                        | 5,169us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember                                                                                                                                                                                        |
| Dealer | Performing                                                                 |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 5,130us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                     | 5,169us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                                                     |
| Dealer | Nonperforming                                                              |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                      | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                                                      |
| Dealer | North America                                                              |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,266us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember                                                                                                                      | 3,209us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember                                                                                                                      |
| Dealer | North America | Performing                                                 |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,266us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                   | 3,209us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                   |
| Dealer | North America | Nonperforming                                              |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                    | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                    |
| Dealer | Europe                                                                     |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 463us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                                                                                                                                | 467us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                                                                                                                                |
| Dealer | Europe | Performing                                                        |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 463us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                             | 467us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                             |
| Dealer | Europe | Nonperforming                                                     |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                            | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                            |
| Dealer | Asia/Pacific                                                               |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 598us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember                                                                                                                         | 637us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember                                                                                                                         |
| Dealer | Asia/Pacific | Performing                                                  |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 598us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                      | 637us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                      |
| Dealer | Asia/Pacific | Nonperforming                                               |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                     | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                     |
| Dealer | Mining                                                                     |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember                                                                                                                                   | 3us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember                                                                                                                                   |
| Dealer | Mining | Performing                                                        |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                | 3us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                |
| Dealer | Mining | Nonperforming                                                     |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                             | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                             |
| Dealer | Latin America                                                              |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 800us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember                                                                                                                        | 853us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember                                                                                                                        |
| Dealer | Latin America | Performing                                                 |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 800us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                     | 853us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                     |
| Dealer | Latin America | Nonperforming                                              |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                    | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                    |
| Dealer | Caterpillar Power Finance                                                  |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember                                                                                                                  | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember                                                                                                                  |
| Dealer | Caterpillar Power Finance | Performing                                     |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                               | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                               |
| Dealer | Caterpillar Power Finance | Nonperforming                                  |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                            | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                            |
| Caterpillar Purchased Receivables                                                   |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,083us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember                                                                                                                                                               | 3,238us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember                                                                                                                                                               |
| Caterpillar Purchased Receivables | Performing                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 3,078us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                            | 3,234us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                                                                            |
| Caterpillar Purchased Receivables | Nonperforming                                   |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 5us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                             | 4us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                                                                             |
| Caterpillar Purchased Receivables | North America                                   |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 1,948us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember                                                                                             | 1,945us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember                                                                                             |
| Caterpillar Purchased Receivables | North America | Performing                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 1,948us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember          | 1,945us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember          |
| Caterpillar Purchased Receivables | North America | Nonperforming                   |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember           | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember           |
| Caterpillar Purchased Receivables | Europe                                          |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 424us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                                                                                                       | 439us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                                                                                                       |
| Caterpillar Purchased Receivables | Europe | Performing                             |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 419us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                    | 435us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                    |
| Caterpillar Purchased Receivables | Europe | Nonperforming                          |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 5us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                   | 4us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                   |
| Caterpillar Purchased Receivables | Asia/Pacific                                    |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 384us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember                                                                                                | 401us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember                                                                                                |
| Caterpillar Purchased Receivables | Asia/Pacific | Performing                       |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 384us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember             | 401us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember             |
| Caterpillar Purchased Receivables | Asia/Pacific | Nonperforming                    |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember            | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember            |
| Caterpillar Purchased Receivables | Mining                                          |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember                                                                                                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember                                                                                                          |
| Caterpillar Purchased Receivables | Mining | Performing                             |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                       | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember                       |
| Caterpillar Purchased Receivables | Mining | Nonperforming                          |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                    | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember                    |
| Caterpillar Purchased Receivables | Latin America                                   |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 311us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember                                                                                               | 431us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember                                                                                               |
| Caterpillar Purchased Receivables | Latin America | Performing                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 311us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember            | 431us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember            |
| Caterpillar Purchased Receivables | Latin America | Nonperforming                   |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember           | 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember           |
| Caterpillar Purchased Receivables | Caterpillar Power Finance                       |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 16us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember                                                                                        | 22us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember                                                                                        |
| Caterpillar Purchased Receivables | Caterpillar Power Finance | Performing          |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | 16us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember     | 22us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_PerformingFinancingReceivableMember     |
| Caterpillar Purchased Receivables | Caterpillar Power Finance | Nonperforming       |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| **Recorded investment in finance receivables**                                      |                                                                                                                                                                                                                                                                                                                                              |                                                                                                                                                                                                                                                                                                                                              |
| Recorded Investment in Finance Receivables, Ending Balance                          | $ 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember | $ 0us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember/ us-gaap_InternalCreditAssessmentAxis= us-gaap_NonperformingFinancingReceivableMember |

| X                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FinancingReceivableRecordedInvestmentLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| 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 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524Reference 2: 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=d3e4428-111522
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