| **Finance Receivables (Details 2) - USD ($) $ in Millions** | Dec. 31, 2015 | Dec. 31, 2014 |
|-------------------------------------------------------------|---------------|---------------|
| **Accounts, Notes, Loans and Financing Receivable**         |          |          |
| Amounts due in 2016                                         | $ 13,033      |          |
| Amounts due in 2017                                         | 5,907         |          |
| Amounts due in 2018                                         | 3,956         |          |
| Amounts due in 2019                                         | 2,169         |          |
| Amounts due in 2020                                         | 1,307         |          |
| Amounts due thereafter                                      | 1,087         |          |
| Total                                                       | 27,459        |          |
| Guaranteed residual value                                   | 369           |          |
| Unguaranteed residual value                                 | 692           |          |
| Total gross finance receivables                             | 28,520        | $ 30,358      |
| Retail Installment Sale Contracts                           |          |          |
| **Accounts, Notes, Loans and Financing Receivable**         |          |          |
| Amounts due in 2016                                         | 2,597         |          |
| Amounts due in 2017                                         | 2,015         |          |
| Amounts due in 2018                                         | 1,368         |          |
| Amounts due in 2019                                         | 699           |          |
| Amounts due in 2020                                         | 202           |          |
| Amounts due thereafter                                      | 11            |          |
| Total                                                       | 6,892         |          |
| Guaranteed residual value                                   | 0             |          |
| Unguaranteed residual value                                 | 0             |          |
| Total gross finance receivables                             | 6,892         |          |
| Wholesale Installment Sale Contracts                        |          |          |
| **Accounts, Notes, Loans and Financing Receivable**         |          |          |
| Amounts due in 2016                                         | 48            |          |
| Amounts due in 2017                                         | 7             |          |
| Amounts due in 2018                                         | 3             |          |
| Amounts due in 2019                                         | 1             |          |
| Amounts due in 2020                                         | 0             |          |
| Amounts due thereafter                                      | 0             |          |
| Total                                                       | 59            |          |
| Guaranteed residual value                                   | 0             |          |
| Unguaranteed residual value                                 | 0             |          |
| Total gross finance receivables                             | 59            |          |
| Retail Finance Leases                                       |          |          |
| **Accounts, Notes, Loans and Financing Receivable**         |          |          |
| Amounts due in 2016                                         | 2,543         |          |
| Amounts due in 2017                                         | 1,661         |          |
| Amounts due in 2018                                         | 939           |          |
| Amounts due in 2019                                         | 425           |          |
| Amounts due in 2020                                         | 170           |          |
| Amounts due thereafter                                      | 98            |          |
| Total                                                       | 5,836         |          |
| Guaranteed residual value                                   | 334           |          |
| Unguaranteed residual value                                 | 666           |          |
| Total gross finance receivables                             | 6,836         |          |
| Wholesale Finance Leases                                    |          |          |
| **Accounts, Notes, Loans and Financing Receivable**         |          |          |
| Amounts due in 2016                                         | 53            |          |
| Amounts due in 2017                                         | 52            |          |
| Amounts due in 2018                                         | 38            |          |
| Amounts due in 2019                                         | 18            |          |
| Amounts due in 2020                                         | 6             |          |
| Amounts due thereafter                                      | 2             |          |
| Total                                                       | 169           |          |
| Guaranteed residual value                                   | 35            |          |
| Unguaranteed residual value                                 | 26            |          |
| Total gross finance receivables                             | 230           |          |
| Retail Notes                                                |          |          |
| **Accounts, Notes, Loans and Financing Receivable**         |          |          |
| Amounts due in 2016                                         | 4,297         |          |
| Amounts due in 2017                                         | 1,940         |          |
| Amounts due in 2018                                         | 1,450         |          |
| Amounts due in 2019                                         | 1,024         |          |
| Amounts due in 2020                                         | 929           |          |
| Amounts due thereafter                                      | 976           |          |
| Total                                                       | 10,616        |          |
| Guaranteed residual value                                   | 0             |          |
| Unguaranteed residual value                                 | 0             |          |
| Total gross finance receivables                             | 10,616        |          |
| Wholesale Notes                                             |          |          |
| **Accounts, Notes, Loans and Financing Receivable**         |          |          |
| Amounts due in 2016                                         | 3,495         |          |
| Amounts due in 2017                                         | 232           |          |
| Amounts due in 2018                                         | 158           |          |
| Amounts due in 2019                                         | 2             |          |
| Amounts due in 2020                                         | 0             |          |
| Amounts due thereafter                                      | 0             |          |
| Total                                                       | 3,887         |          |
| Guaranteed residual value                                   | 0             |          |
| Unguaranteed residual value                                 | 0             |          |
| Total gross finance receivables                             | $ 3,887       |          |

| X                                                                                                                                                                                                                                                                                                      |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the guaranteed residual value of outstanding finance receivables.
+ References
No definition available.
+ Details**Name:**cfsc_GuaranteedResidualValue**Namespace Prefix:**cfsc_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the aggregate amount of finance receivables due as of the latest balance sheet presented in the financial statements.
+ References
No definition available.
+ Details**Name:**cfsc_OutstandingFinanceReceivablesAggregateAmounts**Namespace Prefix:**cfsc_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                      |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the amount of finance receivables due after year five following the date of the latest balance sheet presented in the financial statements.
+ References
No definition available.
+ Details**Name:**cfsc_OutstandingFinanceReceivablesDueAfterYearFive**Namespace Prefix:**cfsc_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the amount of finance receivables due within the next twelve months following the date of the latest balance sheet presented in the financial statements.
+ References
No definition available.
+ Details**Name:**cfsc_OutstandingFinanceReceivablesDueInNextTwelveMonths**Namespace Prefix:**cfsc_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the amount of finance receivables due in year five following the date of the latest balance sheet presented in the financial statements.
+ References
No definition available.
+ Details**Name:**cfsc_OutstandingFinanceReceivablesDueInYearFive**Namespace Prefix:**cfsc_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the amount of finance receivables due in year four following the date of the latest balance sheet presented in the financial statements.
+ References
No definition available.
+ Details**Name:**cfsc_OutstandingFinanceReceivablesDueInYearFour**Namespace Prefix:**cfsc_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the amount of finance receivables due in year three following the date of the latest balance sheet presented in the financial statements.
+ References
No definition available.
+ Details**Name:**cfsc_OutstandingFinanceReceivablesDueInYearThree**Namespace Prefix:**cfsc_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the amount of finance receivables due in year two following the date of the latest balance sheet presented in the financial statements.
+ References
No definition available.
+ Details**Name:**cfsc_OutstandingFinanceReceivablesDueInYearTwo**Namespace Prefix:**cfsc_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                          |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the unguaranteed residual value of outstanding finance receivables.
+ References
No definition available.
+ Details**Name:**cfsc_UnguaranteedResidualValue**Namespace Prefix:**cfsc_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
+ References
No definition available.
+ Details**Name:**us-gaap_AccountsNotesAndLoansReceivableLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522
+ Details**Name:**us-gaap_LoansAndLeasesReceivableGrossCarryingAmount**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=cfsc_RetailInstallmentContractsMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=cfsc_WholesaleInstallmentContractsMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                           |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=cfsc_RetailFinanceLeasesMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=cfsc_WholesaleFinanceLeasesMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=cfsc_RetailNotesMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                      |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=cfsc_WholesaleNotesMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |