| **Financing Activities (Details 6) (USD $)In Millions, unless otherwise specified**                    | 12 Months Ended                                                                                                                                                                                                                                               |
|--------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
||
| **Loan and finance lease receivables modified as TDRs**                                                |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 148us-gaap_FinancingReceivableModificationsNumberOfContracts2                                                                                                                                                                                                 | 210us-gaap_FinancingReceivableModificationsNumberOfContracts2 | 199us-gaap_FinancingReceivableModificationsNumberOfContracts2 |
| Pre-TDR Outstanding Recorded Investment                                                                | $ 372us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2                                                                                                                                                                               | $ 296us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 | $ 284us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 |
| Post-TDR Outstanding Recorded Investment                                                               | 359us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2                                                                                                                                                                                | 300us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 284us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 |
| **TDRs with a payment default which had been modified within twelve months prior to the default date** |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 68us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1                                                                                                                                                                                 | 26us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 | 67us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 |
| Post-TDR Recorded Investment                                                                           | 4us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1                                                                                                                                                                                 | 7us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 | 26us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 |
| Additional investments not recorded                                                                    | 0cfsc_AdditionalInvestmentsNotRecorded                                                                                                                                                                                                                        | 25cfsc_AdditionalInvestmentsNotRecorded | 24cfsc_AdditionalInvestmentsNotRecorded |
| Remaining commitments                                                                                  | 0us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend                                                                                                                                                                                                     |   |   |
| Customer | North America                                                                               |                                                                                                                                                                                                                                                          |   |   |
| **Loan and finance lease receivables modified as TDRs**                                                |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 34us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember                            | 62us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember | 98us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember |
| Pre-TDR Outstanding Recorded Investment                                                                | 12us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember            | 9us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember | 15us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember |
| Post-TDR Outstanding Recorded Investment                                                               | 7us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember            | 9us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember | 15us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember |
| **TDRs with a payment default which had been modified within twelve months prior to the default date** |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 11us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember           | 19us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember | 49us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember |
| Post-TDR Recorded Investment                                                                           | 1us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember           | 4us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember | 4us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_NorthAmericaMember |
| Customer | Europe                                                                                      |                                                                                                                                                                                                                                                          |   |   |
| **Loan and finance lease receivables modified as TDRs**                                                |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 8us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                                     | 51us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember | 21us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember |
| Pre-TDR Outstanding Recorded Investment                                                                | 7us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                     | 7us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember | 8us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember |
| Post-TDR Outstanding Recorded Investment                                                               | 7us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                    | 7us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember | 8us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember |
| **TDRs with a payment default which had been modified within twelve months prior to the default date** |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 46us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                   | 5us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember | 0us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember |
| Post-TDR Recorded Investment                                                                           | 2us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember                   | 0us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember | 0us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_EMEAMember |
| Customer | Asia/Pacific                                                                                |                                                                                                                                                                                                                                                          |   |   |
| **Loan and finance lease receivables modified as TDRs**                                                |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 2us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember                              | 3us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember | 12us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember |
| Pre-TDR Outstanding Recorded Investment                                                                | 0us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember              | 1us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember | 3us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember |
| Post-TDR Outstanding Recorded Investment                                                               | 0us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember             | 1us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember | 3us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember |
| **TDRs with a payment default which had been modified within twelve months prior to the default date** |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 0us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember             | 0us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember | 2us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember |
| Post-TDR Recorded Investment                                                                           | 0us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember            | 0us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember | 1us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_AsiaPacificMember |
| Customer | Mining                                                                                      |                                                                                                                                                                                                                                                          |   |   |
| **Loan and finance lease receivables modified as TDRs**                                                |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 51us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember                                     | 45us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember |   |
| Pre-TDR Outstanding Recorded Investment                                                                | 185us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember                    | 123us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember |   |
| Post-TDR Outstanding Recorded Investment                                                               | 176us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember                   | 123us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_MiningMember |   |
| Customer | Latin America                                                                               |                                                                                                                                                                                                                                                          |   |   |
| **Loan and finance lease receivables modified as TDRs**                                                |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 35us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember                            | 32us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember | 41us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember |
| Pre-TDR Outstanding Recorded Investment                                                                | 31us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember            | 3us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember | 5us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember |
| Post-TDR Outstanding Recorded Investment                                                               | 30us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember           | 3us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember | 5us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember |
| **TDRs with a payment default which had been modified within twelve months prior to the default date** |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 11us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember           | 0us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember | 0us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember |
| Post-TDR Recorded Investment                                                                           | 1us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember           | 0us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember | 0us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= us-gaap_LatinAmericaMember |
| Customer | Caterpillar Power Finance                                                                   |                                                                                                                                                                                                                                                          |   |   |
| **Loan and finance lease receivables modified as TDRs**                                                |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 18us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember                    | 17us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember | 27us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember |
| Pre-TDR Outstanding Recorded Investment                                                                | 137us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember   | 153us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember | 253us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember |
| Post-TDR Outstanding Recorded Investment                                                               | 139us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember  | 157us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember | 253us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember |
| **TDRs with a payment default which had been modified within twelve months prior to the default date** |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 0us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember    | 2us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember | 16us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember |
| Post-TDR Recorded Investment                                                                           | $ 0us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember | $ 3us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember | $ 21us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CustomerMember/ cfsc_ImpairedFinancingReceivableAxis= cfsc_CaterpillarPowerFinanceMember |
| Dealer                                                                                                 |                                                                                                                                                                                                                                                          |   |   |
| **Loan and finance lease receivables modified as TDRs**                                                |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 0us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember                                                                                                 | 0us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember | 0us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_DealerMember |
| Caterpillar Purchased Receivables                                                                      |                                                                                                                                                                                                                                                          |   |   |
| **Loan and finance lease receivables modified as TDRs**                                                |                                                                                                                                                                                                                                                          |   |   |
| Number of Contracts                                                                                    | 0us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember                                                                        | 0us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember | 0us-gaap_FinancingReceivableModificationsNumberOfContracts2/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis= cfsc_CaterpillarPurchasedReceivablesMember |

| X                                                                                                                                                                                                                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the additional funds subsequently loaned to a borrower whose terms had been modified in a troubled debt restructuring.
+ References
No definition available.
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| - Definition
Number of financing receivables that have been modified by troubled debt restructurings.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953676-111524
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| - Definition
Post-modification amount of investment in financing receivables modified by troubled debt restructurings.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953676-111524
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953676-111524
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953682-111524
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953682-111524
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18794-111554
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