<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.0.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>435</ContextCount>
  <ElementCount>461</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>92</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0002002 - Document - Audit Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/AuditInformation</Role>
      <ShortName>Audit Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1001003 - Statement - Consolidated Statements of Profit</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/ConsolidatedStatementsofProfit</Role>
      <ShortName>Consolidated Statements of Profit</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1002004 - Statement - Consolidated Statements of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/ConsolidatedStatementsofComprehensiveIncome</Role>
      <ShortName>Consolidated Statements of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1003005 - Statement - Consolidated Statements of Financial Position</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/ConsolidatedStatementsofFinancialPosition</Role>
      <ShortName>Consolidated Statements of Financial Position</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1004006 - Statement - Consolidated Statements of Financial Position (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/ConsolidatedStatementsofFinancialPositionParentheticals</Role>
      <ShortName>Consolidated Statements of Financial Position (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1005007 - Statement - Consolidated Statements of Changes in Shareholder's Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/ConsolidatedStatementsofChangesinShareholdersEquity</Role>
      <ShortName>Consolidated Statements of Changes in Shareholder's Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1006008 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/ConsolidatedStatementsofCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2101101 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/SummaryofSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2105102 - Disclosure - Finance Receivables</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FinanceReceivables</Role>
      <ShortName>Finance Receivables</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2114103 - Disclosure - Equipment on Operating Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/EquipmentonOperatingLeases</Role>
      <ShortName>Equipment on Operating Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2117104 - Disclosure - Other Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/OtherAssets</Role>
      <ShortName>Other Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2120105 - Disclosure - Concentration of Credit Risk</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/ConcentrationofCreditRisk</Role>
      <ShortName>Concentration of Credit Risk</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2122106 - Disclosure - Credit Commitments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/CreditCommitments</Role>
      <ShortName>Credit Commitments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2124107 - Disclosure - Short-Term Borrowings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/ShortTermBorrowings</Role>
      <ShortName>Short-Term Borrowings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2127108 - Disclosure - Long-Term Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/LongTermDebt</Role>
      <ShortName>Long-Term Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2130109 - Disclosure - Derivative Financial Instruments and Risk Management</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagement</Role>
      <ShortName>Derivative Financial Instruments and Risk Management</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2137110 - Disclosure - Accumulated Other Comprehensive Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/AccumulatedOtherComprehensiveIncomeLoss</Role>
      <ShortName>Accumulated Other Comprehensive Income (Loss)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2140111 - Disclosure - Commitments and Contingent Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/CommitmentsandContingentLiabilities</Role>
      <ShortName>Commitments and Contingent Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2147112 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2155113 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2160114 - Disclosure - Transactions with Related Parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/TransactionswithRelatedParties</Role>
      <ShortName>Transactions with Related Parties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2163115 - Disclosure - Segment and Geographic Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/SegmentandGeographicInformation</Role>
      <ShortName>Segment and Geographic Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2202201 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/SummaryofSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://finance.cat.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2306301 - Disclosure - Finance Receivables (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FinanceReceivablesTables</Role>
      <ShortName>Finance Receivables (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://finance.cat.com/role/FinanceReceivables</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2315302 - Disclosure - Equipment on Operating Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/EquipmentonOperatingLeasesTables</Role>
      <ShortName>Equipment on Operating Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://finance.cat.com/role/EquipmentonOperatingLeases</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2318303 - Disclosure - Other Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/OtherAssetsTables</Role>
      <ShortName>Other Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://finance.cat.com/role/OtherAssets</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2325304 - Disclosure - Short-Term Borrowings (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/ShortTermBorrowingsTables</Role>
      <ShortName>Short-Term Borrowings (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://finance.cat.com/role/ShortTermBorrowings</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2328305 - Disclosure - Long-Term Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/LongTermDebtTables</Role>
      <ShortName>Long-Term Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://finance.cat.com/role/LongTermDebt</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2331306 - Disclosure - Derivative Financial Instruments and Risk Management (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagementTables</Role>
      <ShortName>Derivative Financial Instruments and Risk Management (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagement</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2338307 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/AccumulatedOtherComprehensiveIncomeLossTables</Role>
      <ShortName>Accumulated Other Comprehensive Income (Loss) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://finance.cat.com/role/AccumulatedOtherComprehensiveIncomeLoss</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2341308 - Disclosure - Commitments and Contingent Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/CommitmentsandContingentLiabilitiesTables</Role>
      <ShortName>Commitments and Contingent Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://finance.cat.com/role/CommitmentsandContingentLiabilities</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2348309 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://finance.cat.com/role/IncomeTaxes</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2356310 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://finance.cat.com/role/FairValueMeasurements</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2361311 - Disclosure - Transactions with Related Parties (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/TransactionswithRelatedPartiesTables</Role>
      <ShortName>Transactions with Related Parties (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://finance.cat.com/role/TransactionswithRelatedParties</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2364312 - Disclosure - Segment and Geographic Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/SegmentandGeographicInformationTables</Role>
      <ShortName>Segment and Geographic Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://finance.cat.com/role/SegmentandGeographicInformation</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2403401 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/SummaryofSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/SummaryofSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2404402 - Disclosure - Summary of Significant Accounting Policies (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/SummaryofSignificantAccountingPoliciesDetails2</Role>
      <ShortName>Summary of Significant Accounting Policies (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/SummaryofSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2407403 - Disclosure - Finance Receivables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FinanceReceivablesDetails</Role>
      <ShortName>Finance Receivables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/FinanceReceivablesTables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2408404 - Disclosure - Finance Receivables (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FinanceReceivablesDetails2</Role>
      <ShortName>Finance Receivables (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/FinanceReceivablesTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2409405 - Disclosure - Finance Receivables (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FinanceReceivablesDetails3</Role>
      <ShortName>Finance Receivables (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/FinanceReceivablesTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2410406 - Disclosure - Finance Receivables (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FinanceReceivablesDetails4</Role>
      <ShortName>Finance Receivables (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/FinanceReceivablesTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2411407 - Disclosure - Finance Receivables (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FinanceReceivablesDetails5</Role>
      <ShortName>Finance Receivables (Details 5)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/FinanceReceivablesTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2412408 - Disclosure - Finance Receivables (Details 6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FinanceReceivablesDetails6</Role>
      <ShortName>Finance Receivables (Details 6)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/FinanceReceivablesTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2413409 - Disclosure - Finance Receivables (Details 7)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FinanceReceivablesDetails7</Role>
      <ShortName>Finance Receivables (Details 7)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/FinanceReceivablesTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2416410 - Disclosure - Equipment on Operating Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/EquipmentonOperatingLeasesDetails</Role>
      <ShortName>Equipment on Operating Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/EquipmentonOperatingLeasesTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2419411 - Disclosure - Other Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/OtherAssetsDetails</Role>
      <ShortName>Other Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/OtherAssetsTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2421412 - Disclosure - Concentration of Credit Risk (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/ConcentrationofCreditRiskDetails</Role>
      <ShortName>Concentration of Credit Risk (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/ConcentrationofCreditRisk</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2423413 - Disclosure - Credit Commitments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/CreditCommitmentsDetails</Role>
      <ShortName>Credit Commitments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/CreditCommitments</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2426414 - Disclosure - Short-Term Borrowings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/ShortTermBorrowingsDetails</Role>
      <ShortName>Short-Term Borrowings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/ShortTermBorrowingsTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2429415 - Disclosure - Long-Term Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/LongTermDebtDetails</Role>
      <ShortName>Long-Term Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/LongTermDebtTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2432416 - Disclosure - Derivative Financial Instruments and Risk Management (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagementDetails</Role>
      <ShortName>Derivative Financial Instruments and Risk Management (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagementTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2433417 - Disclosure - Derivative Financial Instruments and Risk Management (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagementDetails2</Role>
      <ShortName>Derivative Financial Instruments and Risk Management (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagementTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2434418 - Disclosure - Derivative Financial Instruments and Risk Management (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagementDetails3</Role>
      <ShortName>Derivative Financial Instruments and Risk Management (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagementTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2435419 - Disclosure - Derivative Financial Instruments and Risk Management (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagementDetails4</Role>
      <ShortName>Derivative Financial Instruments and Risk Management (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagementTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2436420 - Disclosure - Derivative Financial Instruments and Risk Management (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagementDetails5</Role>
      <ShortName>Derivative Financial Instruments and Risk Management (Details 5)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/DerivativeFinancialInstrumentsandRiskManagementTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2439421 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/AccumulatedOtherComprehensiveIncomeLossDetails</Role>
      <ShortName>Accumulated Other Comprehensive Income (Loss) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/AccumulatedOtherComprehensiveIncomeLossTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2442422 - Disclosure - Commitments and Contingent Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/CommitmentsandContingentLiabilitiesDetails</Role>
      <ShortName>Commitments and Contingent Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/CommitmentsandContingentLiabilitiesTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2443423 - Disclosure - Commitments and Contingent Liabilities (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/CommitmentsandContingentLiabilitiesDetails2</Role>
      <ShortName>Commitments and Contingent Liabilities (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/CommitmentsandContingentLiabilitiesTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2444424 - Disclosure - Commitments and Contingent Liabilities (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/CommitmentsandContingentLiabilitiesDetails3</Role>
      <ShortName>Commitments and Contingent Liabilities (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/CommitmentsandContingentLiabilitiesTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2445425 - Disclosure - Commitments and Contingent Liabilities (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/CommitmentsandContingentLiabilitiesDetails4</Role>
      <ShortName>Commitments and Contingent Liabilities (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/CommitmentsandContingentLiabilitiesTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2446426 - Disclosure - Commitments and Contingent Liabilities (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/CommitmentsandContingentLiabilitiesDetails5</Role>
      <ShortName>Commitments and Contingent Liabilities (Details 5)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/CommitmentsandContingentLiabilitiesTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2449427 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/IncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/IncomeTaxesTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2450428 - Disclosure - Income Taxes (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/IncomeTaxesDetails2</Role>
      <ShortName>Income Taxes (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/IncomeTaxesTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2451429 - Disclosure - Income Taxes (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/IncomeTaxesDetails3</Role>
      <ShortName>Income Taxes (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/IncomeTaxesTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2452430 - Disclosure - Income Taxes (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/IncomeTaxesDetails4</Role>
      <ShortName>Income Taxes (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/IncomeTaxesTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2453431 - Disclosure - Income Taxes (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/IncomeTaxesDetails5</Role>
      <ShortName>Income Taxes (Details 5)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/IncomeTaxesTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2454432 - Disclosure - Income Taxes (Details 6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/IncomeTaxesDetails6</Role>
      <ShortName>Income Taxes (Details 6)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/IncomeTaxesTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2457433 - Disclosure - Fair Value Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FairValueMeasurementsDetails</Role>
      <ShortName>Fair Value Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2458434 - Disclosure - Fair Value Measurements (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FairValueMeasurementsDetails2</Role>
      <ShortName>Fair Value Measurements (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2459435 - Disclosure - Fair Value Measurements (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/FairValueMeasurementsDetails3</Role>
      <ShortName>Fair Value Measurements (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2462436 - Disclosure - Transactions with Related Parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/TransactionswithRelatedPartiesDetails</Role>
      <ShortName>Transactions with Related Parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/TransactionswithRelatedPartiesTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2465437 - Disclosure - Segment and Geographic Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/SegmentandGeographicInformationDetails</Role>
      <ShortName>Segment and Geographic Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/SegmentandGeographicInformationTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="cfsc-20211231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2466438 - Disclosure - Segment and Geographic Information (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://finance.cat.com/role/SegmentandGeographicInformationDetails2</Role>
      <ShortName>Segment and Geographic Information (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://finance.cat.com/role/SegmentandGeographicInformationTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-K" original="cfsc-20211231.htm">cfsc-20211231.htm</File>
    <File>cfsc-12312021x10kxex23.htm</File>
    <File>cfsc-12312021x10kxex311.htm</File>
    <File>cfsc-12312021x10kxex312.htm</File>
    <File>cfsc-12312021x10kxex32.htm</File>
    <File>cfsc-20211231.xsd</File>
    <File>cfsc-20211231_cal.xml</File>
    <File>cfsc-20211231_def.xml</File>
    <File>cfsc-20211231_lab.xml</File>
    <File>cfsc-20211231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>cfsc-20211231_g1.jpg</File>
    <File>cfsc-20211231_g2.jpg</File>
    <File>cfsc-20211231_g3.jpg</File>
    <File>cfsc-20211231_g4.jpg</File>
    <File>cfsc-20211231_g5.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1698">http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="36">http://xbrl.sec.gov/dei/2021q4</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
