| **Consolidated Statements of Profit (USD $)In Millions, unless otherwise specified** | 3 Months Ended                                                                                                         |
|--------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------|
||
| **Revenues:**                                                                        |                                                                                                                   |  |   |  |
| Retail finance                                                                       | $ 320cfsc_RetailFinanceRevenue                                                                                         |  | $ 338cfsc_RetailFinanceRevenue |  |
| Operating lease                                                                      | 256us-gaap_OperatingLeasesIncomeStatementLeaseRevenue                                                                  |  | 259us-gaap_OperatingLeasesIncomeStatementLeaseRevenue |  |
| Wholesale finance                                                                    | 73cfsc_WholesaleFinanceRevenue                                                                                         |  | 73cfsc_WholesaleFinanceRevenue |  |
| Other, net                                                                           | 40us-gaap_RevenueOtherFinancialServices                                                                                |  | 41us-gaap_RevenueOtherFinancialServices |  |
| Total revenues                                                                       | 689us-gaap_FinancialServicesRevenue                                                                                    |  | 711us-gaap_FinancialServicesRevenue |  |
| **Expenses:**                                                                        |                                                                                                                   |  |   |  |
| Interest                                                                             | 151us-gaap_InterestExpense                                                                                             |  | 162us-gaap_InterestExpense |  |
| Depreciation on equipment leased to others                                           | 212us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease                          |  | 214us-gaap_OperatingLeasesIncomeStatementDepreciationExpenseOnPropertySubjectToOrHeldForLease |  |
| General, operating and administrative                                                | 103us-gaap_SellingGeneralAndAdministrativeExpense                                                                      |  | 101us-gaap_SellingGeneralAndAdministrativeExpense |  |
| Provision for credit losses                                                          | 18us-gaap_ProvisionForLoanLeaseAndOtherLosses                                                                          |  | 37us-gaap_ProvisionForLoanLeaseAndOtherLosses |  |
| Other                                                                                | 9us-gaap_OtherCostAndExpenseOperating                                                                                  |  | 8us-gaap_OtherCostAndExpenseOperating |  |
| Total expenses                                                                       | 493us-gaap_FinancialServicesCosts                                                                                      |  | 522us-gaap_FinancialServicesCosts |  |
| Other income (expense)                                                               | (9)us-gaap_OtherNonoperatingIncomeExpense                                                                              |  | (7)us-gaap_OtherNonoperatingIncomeExpense |  |
| Profit before income taxes                                                           | 187us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |  | 182us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |  |
| Provision for income taxes                                                           | 52us-gaap_IncomeTaxExpenseBenefit                                                                                      |  | 48us-gaap_IncomeTaxExpenseBenefit |  |
| Profit of consolidated companies                                                     | 135us-gaap_ProfitLoss                                                                                                  |  | 134us-gaap_ProfitLoss |  |
| Less: Profit attributable to noncontrolling interests                                | 2us-gaap_NetIncomeLossAttributableToNoncontrollingInterest                                                             |  | 3us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  |
| Profit                                                                               | $ 133us-gaap_NetIncomeLoss                                                                                             | [1] | $ 131us-gaap_NetIncomeLoss | [1] |
|                                                                                      |
| [1]Profit attributable to Caterpillar Financial Services Corporation.                |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Includes revenue earned on loans that allow customers and dealers to use their equipment or other assets as collateral to obtain financing. Also includes the revenue recognized from retail finance leases and installment sales contract.
+ References
No definition available.
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| - Definition
Includes revenue earned on inventory/rental programs, which provide assistance to dealers by financing their new equipment inventory and rental fleets.  Also includes revenue earned on short-term receivables we purchase from parent entity at a discount.
+ References
No definition available.
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| - Definition
The aggregate costs incurred during the reporting period related to financial services rendered by an entity.
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| - Definition
The aggregate financial services revenue and operating interest income earned during the reporting period.
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| - 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.
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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
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| - Definition
Amount of the cost of borrowed funds accounted for as interest expense.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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| - Definition
Amount of Net Income (Loss) attributable to noncontrolling interest.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The total depreciation charge recorded for property subject to or held for lease.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.
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| - Definition
The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items.
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| - Definition
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.
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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.
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| - Definition
Fees and other service revenues recognized in the period that are not otherwise specified in the taxonomy.
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| - Definition
The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.
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