| **Finance Receivables (Details 6) - USD ($) $ in Millions** | Jun. 30, 2024 | Dec. 31, 2023 |
|-------------------------------------------------------------|---------------|---------------|
| Customer                                                    |          |          |
| **Financing Receivable, Past Due**                          |          |          |
| Amortized Cost, Non-accrual With an Allowance               | $ 176         | $ 152         |
| Amortized Cost, 91+ Still Accruing                          | 29            | 44            |
| Customer | North America                                    |          |          |
| **Financing Receivable, Past Due**                          |          |          |
| Amortized Cost, Non-accrual With an Allowance               | 71            | 52            |
| Amortized Cost, 91+ Still Accruing                          | 19            | 20            |
| Customer | EAME                                             |          |          |
| **Financing Receivable, Past Due**                          |          |          |
| Amortized Cost, Non-accrual With an Allowance               | 56            | 34            |
| Amortized Cost, 91+ Still Accruing                          | 7             | 18            |
| Customer | Asia/Pacific                                     |          |          |
| **Financing Receivable, Past Due**                          |          |          |
| Amortized Cost, Non-accrual With an Allowance               | 5             | 8             |
| Amortized Cost, 91+ Still Accruing                          | 3             | 5             |
| Customer | Mining                                           |          |          |
| **Financing Receivable, Past Due**                          |          |          |
| Amortized Cost, Non-accrual With an Allowance               | 13            | 2             |
| Amortized Cost, 91+ Still Accruing                          | 0             | 0             |
| Customer | Latin America                                    |          |          |
| **Financing Receivable, Past Due**                          |          |          |
| Amortized Cost, Non-accrual With an Allowance               | 28            | 48            |
| Amortized Cost, 91+ Still Accruing                          | 0             | 1             |
| Customer | Power                                            |          |          |
| **Financing Receivable, Past Due**                          |          |          |
| Amortized Cost, Non-accrual With an Allowance               | 3             | 8             |
| Amortized Cost, 91+ Still Accruing                          | 0             | 0             |
| Dealer                                                      |          |          |
| **Financing Receivable, Past Due**                          |          |          |
| Amortized Cost, Non-accrual With an Allowance               | $ 0           |          |
| Dealer | Latin America                                      |          |          |
| **Financing Receivable, Past Due**                          |          |          |
| Amortized Cost, Non-accrual With an Allowance               |          | $ 47          |

| X                                                                                                                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Financing receivables that are 91 days or more past due and still accruing.
+ References
No definition available.
+ Details**Name:**cfsc_FinancingReceivable91DaysPastDueandStillAccruing**Namespace Prefix:**cfsc_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.
+ References
Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) -Publisher SECReference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) -Publisher SECReference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-7
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| 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
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-14Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80
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| X                                                                                                                                                           |
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| X                                                                                                                                                                                            |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                                        |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                                           |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                                       |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                                            |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                                                        |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                         |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------|
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