| **Segment Information (Details) (USD $)In Millions, unless otherwise specified** | 3 Months Ended                                                                                                                                                  | 12 Months Ended                                                                                                        |
|----------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------|
||
| **Segment Reporting Information**                                                |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| Revenues                                                                         | $ 703us-gaap_FinancialServicesRevenue                                                                                                                           | $ 743us-gaap_FinancialServicesRevenue                                                                                  | $ 728us-gaap_FinancialServicesRevenue | $ 711us-gaap_FinancialServicesRevenue | $ 711us-gaap_FinancialServicesRevenue | $ 699us-gaap_FinancialServicesRevenue | $ 695us-gaap_FinancialServicesRevenue | $ 680us-gaap_FinancialServicesRevenue | $ 2,885us-gaap_FinancialServicesRevenue | $ 2,785us-gaap_FinancialServicesRevenue | $ 2,693us-gaap_FinancialServicesRevenue |
| Segment Profit                                                                   | 166us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments                                          | 197us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 208us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 182us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 204us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 164us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 141us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 185us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 753us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 694us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 584us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |
| Interest Expense                                                                 |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 631us-gaap_InterestExpense | 734us-gaap_InterestExpense | 801us-gaap_InterestExpense |
| Depreciation on equipment leased to others                                       |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 870us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease | 770us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease | 688us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease |
| Provision for credit losses                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 139us-gaap_ProvisionForLoanLeaseAndOtherLosses | 101us-gaap_ProvisionForLoanLeaseAndOtherLosses | 163us-gaap_ProvisionForLoanLeaseAndOtherLosses |
| Segment Assets                                                                   | 35,176us-gaap_Assets                                                                                                                                            |                                                                                                                   |   |   | 35,114us-gaap_Assets |   |   |   | 35,176us-gaap_Assets | 35,114us-gaap_Assets | 34,735us-gaap_Assets |
| Capital expenditures                                                             |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 1,627cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions | 1,822cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions | 1,660cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions |
| Operating Segments                                                               |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information**                                                |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| Revenues                                                                         |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 2,843us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 2,738us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 2,644us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember |
| Segment Profit                                                                   |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 806us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 759us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 651us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember |
| Interest Expense                                                                 |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 639us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 720us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 790us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember |
| Depreciation on equipment leased to others                                       |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 869us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 769us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 687us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember |
| Provision for credit losses                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 139us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 103us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 159us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember |
| Segment Assets                                                                   | 33,866us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember                                                                           |                                                                                                                   |   |   | 33,867us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember |   |   |   | 33,866us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 33,867us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 33,419us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember |
| Capital expenditures                                                             |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 1,624cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 1,819cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember | 1,658cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember |
| Unallocated                                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information**                                                |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| Revenues                                                                         |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 70us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | 73us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | 73us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember |
| Segment Profit                                                                   |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | (82)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | (73)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | (93)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember |
| Interest Expense                                                                 |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 48us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | 53us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | 61us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember |
| Depreciation on equipment leased to others                                       |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 1us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | 1us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | 1us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember |
| Provision for credit losses                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 2us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | 2us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | 1us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember |
| Segment Assets                                                                   | 1,648us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember                                                                          |                                                                                                                   |   |   | 1,595us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember |   |   |   | 1,648us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | 1,595us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | 1,529us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember |
| Capital expenditures                                                             |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 1cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | 1cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember | 0cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_CorporateNonSegmentMember |
| Timing                                                                           |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information**                                                |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| Revenues                                                                         |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | (28)us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | (26)us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | (24)us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember |
| Segment Profit                                                                   |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | (8)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | (10)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | (6)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember |
| Interest Expense                                                                 |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 0us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | 0us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | 0us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember |
| Depreciation on equipment leased to others                                       |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 0us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | 0us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | 0us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember |
| Provision for credit losses                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | (2)us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | (4)us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | 3us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember |
| Segment Assets                                                                   | 120us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember                                                                                            |                                                                                                                   |   |   | 68us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember |   |   |   | 120us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | 68us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | 17us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember |
| Capital expenditures                                                             |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 2cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | 2cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember | 2cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= cfsc_TimingMember |
| Methodology                                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information**                                                |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| Revenues                                                                         |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 0us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | 0us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | 0us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember |
| Segment Profit                                                                   |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 37us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | 18us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | 32us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember |
| Interest Expense                                                                 |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | (56)us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | (39)us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | (50)us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember |
| Depreciation on equipment leased to others                                       |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 0us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | 0us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | 0us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember |
| Provision for credit losses                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 0us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | 0us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | 0us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember |
| Segment Assets                                                                   | (215)us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember                                                                                     |                                                                                                                   |   |   | (189)us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember |   |   |   | (215)us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | (189)us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | (61)us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember |
| Capital expenditures                                                             |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 0cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | 0cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember | 0cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= cfsc_MethodologyMember |
| Intersegment Eliminations                                                        |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information**                                                |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| Revenues                                                                         |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 0us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | 0us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | 0us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember |
| Segment Profit                                                                   |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | 0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | 0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember |
| Interest Expense                                                                 |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 0us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | 0us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | 0us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember |
| Depreciation on equipment leased to others                                       |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 0us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | 0us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | 0us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember |
| Provision for credit losses                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 0us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | 0us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | 0us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember |
| Segment Assets                                                                   | (243)us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember                                                                      |                                                                                                                   |   |   | (227)us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember |   |   |   | (243)us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | (227)us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | (169)us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember |
| Capital expenditures                                                             |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 0cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | 0cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember | 0cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_IntersegmentEliminationMember |
| North America | Operating Segments                                               |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information**                                                |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| Revenues                                                                         |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 1,067us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 946us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 938us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember |
| Segment Profit                                                                   |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 355us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 283us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 264us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember |
| Interest Expense                                                                 |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 240us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 259us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 270us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember |
| Depreciation on equipment leased to others                                       |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 361us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 293us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 274us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember |
| Provision for credit losses                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 3us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 0us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 15us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember |
| Segment Assets                                                                   | 13,661us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember        |                                                                                                                   |   |   | 12,160us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember |   |   |   | 13,661us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 12,160us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 11,309us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember |
| Capital expenditures                                                             |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 1,077cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 782cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember | 565cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_NorthAmericaMember |
| Europe and CPF | Operating Segments                                              |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information**                                                |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| Revenues                                                                         |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 498us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 505us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 467us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember |
| Segment Profit                                                                   |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 134us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 146us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 84us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember |
| Interest Expense                                                                 |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 88us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 110us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 134us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember |
| Depreciation on equipment leased to others                                       |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 98us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 86us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 76us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember |
| Provision for credit losses                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 50us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 47us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 65us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember |
| Segment Assets                                                                   | 7,601us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember            |                                                                                                                   |   |   | 8,068us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember |   |   |   | 7,601us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 8,068us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 7,785us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember |
| Capital expenditures                                                             |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 133cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 242cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember | 243cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_EuropeAndCpfMember |
| Asia/Pacific | Operating Segments                                                |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information**                                                |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| Revenues                                                                         |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 368us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 399us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 399us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember |
| Segment Profit                                                                   |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 129us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 156us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 134us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember |
| Interest Expense                                                                 |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 116us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 135us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 155us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember |
| Depreciation on equipment leased to others                                       |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 24us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 25us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 23us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember |
| Provision for credit losses                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 35us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 9us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 24us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember |
| Segment Assets                                                                   | 4,767us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember          |                                                                                                                   |   |   | 5,251us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember |   |   |   | 4,767us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 5,251us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 6,144us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember |
| Capital expenditures                                                             |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 34cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 54cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember | 133cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_AsiaPacificMember |
| Latin America | Operating Segments                                               |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information**                                                |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| Revenues                                                                         |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 449us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 414us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 389us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember |
| Segment Profit                                                                   |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 124us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 89us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 109us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember |
| Interest Expense                                                                 |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 130us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 137us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 141us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember |
| Depreciation on equipment leased to others                                       |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 114us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 93us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 64us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember |
| Provision for credit losses                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 22us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 35us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 28us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember |
| Segment Assets                                                                   | 4,676us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember         |                                                                                                                   |   |   | 4,947us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember |   |   |   | 4,676us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 4,947us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 4,969us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember |
| Capital expenditures                                                             |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 111cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 272cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember | 172cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= us-gaap_LatinAmericaMember |
| Mining | Operating Segments                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| **Segment Reporting Information**                                                |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   |   |   |   |
| Revenues                                                                         |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 461us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | 474us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | 451us-gaap_FinancialServicesRevenue/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember |
| Segment Profit                                                                   |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 64us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | 85us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | 60us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember |
| Interest Expense                                                                 |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 65us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | 79us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | 90us-gaap_InterestExpense/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember |
| Depreciation on equipment leased to others                                       |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 272us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | 272us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | 250us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember |
| Provision for credit losses                                                      |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | 29us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | 12us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | 27us-gaap_ProvisionForLoanLeaseAndOtherLosses/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember |
| Segment Assets                                                                   | 3,161us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember |                                                                                                                   |   |   | 3,441us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember |   |   |   | 3,161us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | 3,441us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | 3,212us-gaap_Assets/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember |
| Capital expenditures                                                             |                                                                                                                                                            |                                                                                                                   |   |   |   |   |   |   | $ 269cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | $ 469cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember | $ 545cfsc_ExpendituresForEquipmentOnOperatingLeasesAndForNonLeasedTransactions/ us-gaap_ConsolidationItemsAxis= us-gaap_OperatingSegmentsMember/ us-gaap_StatementBusinessSegmentsAxis= cfsc_MiningReportableSegmentMember |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow for purchases on long lived, depreciable tangible personal property, nonconsumable in nature, with finite lives used to generate rental income and the cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.
+ References
No definition available.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The aggregate financial services revenue and operating interest income earned during the reporting period.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of the cost of borrowed funds accounted for as interest expense.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The total depreciation charge recorded for property subject to or held for lease.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.
+ References
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