<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1936</ContextCount>
  <ElementCount>544</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>269</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>9952151 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSUNAUDITED</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>9952152 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEUNAUDITED</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>9952153 - Statement - CONSOLIDATED BALANCE SHEETS (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/CONSOLIDATEDBALANCESHEETSUNAUDITED</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>9952154 - Statement - CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/CONSOLIDATEDBALANCESHEETSUNAUDITEDParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>9952155 - Statement - CONSOLIDATED STATEMENTS OF EQUITY (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/CONSOLIDATEDSTATEMENTSOFEQUITYUNAUDITED</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF EQUITY (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>9952156 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWSUNAUDITED</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>9952157 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWSUNAUDITEDParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>9952158 - Disclosure - Basis of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/BasisofPresentation</Role>
      <ShortName>Basis of Presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>9952159 - Disclosure - Recent Accounting Pronouncements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/RecentAccountingPronouncements</Role>
      <ShortName>Recent Accounting Pronouncements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>9952160 - Disclosure - Revenue from Contracts with Customers</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/RevenuefromContractswithCustomers</Role>
      <ShortName>Revenue from Contracts with Customers</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>9952161 - Disclosure - Variable Interest Entities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/VariableInterestEntities</Role>
      <ShortName>Variable Interest Entities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>9952162 - Disclosure - Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/Investments</Role>
      <ShortName>Investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>9952163 - Disclosure - Financing Receivables</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivables</Role>
      <ShortName>Financing Receivables</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>9952164 - Disclosure - Deferred Acquisition Costs and Deferred Sales Inducement Costs</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DeferredAcquisitionCostsandDeferredSalesInducementCosts</Role>
      <ShortName>Deferred Acquisition Costs and Deferred Sales Inducement Costs</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>9952165 - Disclosure - Policyholder Account Balances, Future Policy Benefits and Claims</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/PolicyholderAccountBalancesFuturePolicyBenefitsandClaims</Role>
      <ShortName>Policyholder Account Balances, Future Policy Benefits and Claims</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>9952166 - Disclosure - Separate Account Assets and Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/SeparateAccountAssetsandLiabilities</Role>
      <ShortName>Separate Account Assets and Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>9952167 - Disclosure - Market Risk Benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/MarketRiskBenefits</Role>
      <ShortName>Market Risk Benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>9952168 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>9952169 - Disclosure - Fair Values of Assets and Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FairValuesofAssetsandLiabilities</Role>
      <ShortName>Fair Values of Assets and Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>9952170 - Disclosure - Offsetting Assets and Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/OffsettingAssetsandLiabilities</Role>
      <ShortName>Offsetting Assets and Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>9952171 - Disclosure - Derivatives and Hedging Activities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DerivativesandHedgingActivities</Role>
      <ShortName>Derivatives and Hedging Activities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>9952172 - Disclosure - Shareholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/ShareholdersEquity</Role>
      <ShortName>Shareholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>9952173 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>9952174 - Disclosure - Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/Contingencies</Role>
      <ShortName>Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>9952175 - Disclosure - Earnings per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/EarningsperShare</Role>
      <ShortName>Earnings per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>9952176 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/SegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>9955511 - Disclosure - Basis of Presentation (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/BasisofPresentationPolicies</Role>
      <ShortName>Basis of Presentation (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/RecentAccountingPronouncements</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>9955512 - Disclosure - Revenue from Contracts with Customers (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/RevenuefromContractswithCustomersTables</Role>
      <ShortName>Revenue from Contracts with Customers (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/RevenuefromContractswithCustomers</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>9955513 - Disclosure - Variable Interest Entities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/VariableInterestEntitiesTables</Role>
      <ShortName>Variable Interest Entities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/VariableInterestEntities</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>9955514 - Disclosure - Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/InvestmentsTables</Role>
      <ShortName>Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/Investments</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>9955515 - Disclosure - Financing Receivables (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesTables</Role>
      <ShortName>Financing Receivables (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/FinancingReceivables</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>9955516 - Disclosure - Deferred Acquisition Costs and Deferred Sales Inducement Costs (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DeferredAcquisitionCostsandDeferredSalesInducementCostsTables</Role>
      <ShortName>Deferred Acquisition Costs and Deferred Sales Inducement Costs (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/DeferredAcquisitionCostsandDeferredSalesInducementCosts</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9955517 - Disclosure - Policyholder Account Balances, Future Policy Benefits and Claims (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/PolicyholderAccountBalancesFuturePolicyBenefitsandClaimsTables</Role>
      <ShortName>Policyholder Account Balances, Future Policy Benefits and Claims (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/PolicyholderAccountBalancesFuturePolicyBenefitsandClaims</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9955518 - Disclosure - Separate Account Assets and Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/SeparateAccountAssetsandLiabilitiesTables</Role>
      <ShortName>Separate Account Assets and Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/SeparateAccountAssetsandLiabilities</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9955519 - Disclosure - Market Risk Benefits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/MarketRiskBenefitsTables</Role>
      <ShortName>Market Risk Benefits (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/MarketRiskBenefits</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9955520 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/Debt</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9955521 - Disclosure - Fair Values of Assets and Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FairValuesofAssetsandLiabilitiesTables</Role>
      <ShortName>Fair Values of Assets and Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/FairValuesofAssetsandLiabilities</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9955522 - Disclosure - Offsetting Assets and Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/OffsettingAssetsandLiabilitiesTables</Role>
      <ShortName>Offsetting Assets and Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/OffsettingAssetsandLiabilities</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9955523 - Disclosure - Derivatives and Hedging Activities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DerivativesandHedgingActivitiesTables</Role>
      <ShortName>Derivatives and Hedging Activities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/DerivativesandHedgingActivities</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9955524 - Disclosure - Shareholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/ShareholdersEquityTables</Role>
      <ShortName>Shareholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/ShareholdersEquity</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9955525 - Disclosure - Earnings per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/EarningsperShareTables</Role>
      <ShortName>Earnings per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/EarningsperShare</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9955526 - Disclosure - Segment Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/SegmentInformationTables</Role>
      <ShortName>Segment Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/SegmentInformation</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9955527 - Disclosure - Revenue from Contracts with Customers - Disaggregated Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/RevenuefromContractswithCustomersDisaggregatedRevenueDetails</Role>
      <ShortName>Revenue from Contracts with Customers - Disaggregated Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9955528 - Disclosure - Revenue from Contracts with Customers - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/RevenuefromContractswithCustomersNarrativeDetails</Role>
      <ShortName>Revenue from Contracts with Customers - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9955529 - Disclosure - Variable Interest Entities - Investment Entities Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/VariableInterestEntitiesInvestmentEntitiesNarrativeDetails</Role>
      <ShortName>Variable Interest Entities - Investment Entities Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9955530 - Disclosure - Variable Interest Entities - Fair Value of Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/VariableInterestEntitiesFairValueofAssetsandLiabilitiesDetails</Role>
      <ShortName>Variable Interest Entities - Fair Value of Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9955531 - Disclosure - Variable Interest Entities - Changes in Level 3 Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/VariableInterestEntitiesChangesinLevel3AssetsDetails</Role>
      <ShortName>Variable Interest Entities - Changes in Level 3 Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9955532 - Disclosure - Variable Interest Entities - Fair Value Option (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/VariableInterestEntitiesFairValueOptionDetails</Role>
      <ShortName>Variable Interest Entities - Fair Value Option (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9955533 - Disclosure - Variable Interest Entities - Debt and Stated Interest Rates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/VariableInterestEntitiesDebtandStatedInterestRatesDetails</Role>
      <ShortName>Variable Interest Entities - Debt and Stated Interest Rates (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9955534 - Disclosure - Investments - Summary (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/InvestmentsSummaryDetails</Role>
      <ShortName>Investments - Summary (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9955535 - Disclosure - Investments - Summary of Net Investment Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/InvestmentsSummaryofNetInvestmentIncomeDetails</Role>
      <ShortName>Investments - Summary of Net Investment Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9955536 - Disclosure - Investments - Available-for-Sale Securities by Type (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/InvestmentsAvailableforSaleSecuritiesbyTypeDetails</Role>
      <ShortName>Investments - Available-for-Sale Securities by Type (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9955537 - Disclosure - Investments - Summary of Fixed Maturity Securities by Rating (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/InvestmentsSummaryofFixedMaturitySecuritiesbyRatingDetails</Role>
      <ShortName>Investments - Summary of Fixed Maturity Securities by Rating (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9955538 - Disclosure - Investments - Available-for Sale Securities in Continuous Unrealized Loss Position (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/InvestmentsAvailableforSaleSecuritiesinContinuousUnrealizedLossPositionDetails</Role>
      <ShortName>Investments - Available-for Sale Securities in Continuous Unrealized Loss Position (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9955539 - Disclosure - Investments - Rollforward of Allowance for Credit Losses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/InvestmentsRollforwardofAllowanceforCreditLossesDetails</Role>
      <ShortName>Investments - Rollforward of Allowance for Credit Losses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9955540 - Disclosure - Investments - Net Realized Gains and Losses on Available-for-Sale Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/InvestmentsNetRealizedGainsandLossesonAvailableforSaleSecuritiesDetails</Role>
      <ShortName>Investments - Net Realized Gains and Losses on Available-for-Sale Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9955541 - Disclosure - Investments - Available-for-Sale Securities by Contractual Maturity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/InvestmentsAvailableforSaleSecuritiesbyContractualMaturityDetails</Role>
      <ShortName>Investments - Available-for-Sale Securities by Contractual Maturity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9955542 - Disclosure - Financing Receivables - Allowance for Credit Losses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesAllowanceforCreditLossesDetails</Role>
      <ShortName>Financing Receivables - Allowance for Credit Losses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9955543 - Disclosure - Financing Receivables - Purchases, Sales and Nonperforming (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesPurchasesSalesandNonperformingDetails</Role>
      <ShortName>Financing Receivables - Purchases, Sales and Nonperforming (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9955544 - Disclosure - Financing Receivables - General Credit Quality Information - Commercial Mortgage Loans - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesGeneralCreditQualityInformationCommercialMortgageLoansNarrativeDetails</Role>
      <ShortName>Financing Receivables - General Credit Quality Information - Commercial Mortgage Loans - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9955545 - Disclosure - Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesCreditQualityCommercialMortgageLoansbyLTVRatioandYearofOriginationDetails</Role>
      <ShortName>Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9955546 - Disclosure - Financing Receivables - Credit Quality - Commercial Mortgage Loans by Region (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesCreditQualityCommercialMortgageLoansbyRegionDetails</Role>
      <ShortName>Financing Receivables - Credit Quality - Commercial Mortgage Loans by Region (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9955547 - Disclosure - Financing Receivables - Credit Quality - Commercial Mortgage Loans by Property Type (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesCreditQualityCommercialMortgageLoansbyPropertyTypeDetails</Role>
      <ShortName>Financing Receivables - Credit Quality - Commercial Mortgage Loans by Property Type (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9955548 - Disclosure - Financing Receivables - Credit Quality Information - Syndicated Loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesCreditQualityInformationSyndicatedLoansDetails</Role>
      <ShortName>Financing Receivables - Credit Quality Information - Syndicated Loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9955549 - Disclosure - Financing Receivables - Credit Quality Information - Financial Advisor Loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesCreditQualityInformationFinancialAdvisorLoansDetails</Role>
      <ShortName>Financing Receivables - Credit Quality Information - Financial Advisor Loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9955550 - Disclosure - Financing Receivables - Residential Mortgage Loans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesResidentialMortgageLoansDetails</Role>
      <ShortName>Financing Receivables - Residential Mortgage Loans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9955551 - Disclosure - Financing Receivables - Residential Mortgage Loans by Region (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesResidentialMortgageLoansbyRegionDetails</Role>
      <ShortName>Financing Receivables - Residential Mortgage Loans by Region (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9955552 - Disclosure - Financing Receivables - Credit Quality Information - Credit Card Receivables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesCreditQualityInformationCreditCardReceivablesDetails</Role>
      <ShortName>Financing Receivables - Credit Quality Information - Credit Card Receivables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9955553 - Disclosure - Financing Receivables - Credit Quality Information - Other Loans and Deposit Receivable - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FinancingReceivablesCreditQualityInformationOtherLoansandDepositReceivableNarrativeDetails</Role>
      <ShortName>Financing Receivables - Credit Quality Information - Other Loans and Deposit Receivable - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9955554 - Disclosure - Deferred Acquisition Costs and Deferred Sales Inducement Costs - Deferred Acquisition Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DeferredAcquisitionCostsandDeferredSalesInducementCostsDeferredAcquisitionCostsDetails</Role>
      <ShortName>Deferred Acquisition Costs and Deferred Sales Inducement Costs - Deferred Acquisition Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9955555 - Disclosure - Deferred Acquisition Costs and Deferred Sales Inducement Costs - Deferred Sales Inducement Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DeferredAcquisitionCostsandDeferredSalesInducementCostsDeferredSalesInducementCostsDetails</Role>
      <ShortName>Deferred Acquisition Costs and Deferred Sales Inducement Costs - Deferred Sales Inducement Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9955556 - Disclosure - Policyholder Account Balances, Future Policy Benefits and Claims - Composition (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/PolicyholderAccountBalancesFuturePolicyBenefitsandClaimsCompositionDetails</Role>
      <ShortName>Policyholder Account Balances, Future Policy Benefits and Claims - Composition (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/PolicyholderAccountBalancesFuturePolicyBenefitsandClaimsTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9955557 - Disclosure - Policyholder Account Balances, Future Policy Benefits and Claims - Balance of and Changes in Policyholder Account Balances (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/PolicyholderAccountBalancesFuturePolicyBenefitsandClaimsBalanceofandChangesinPolicyholderAccountBalancesDetails</Role>
      <ShortName>Policyholder Account Balances, Future Policy Benefits and Claims - Balance of and Changes in Policyholder Account Balances (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9955558 - Disclosure - Policyholder Account Balances, Future Policy Benefits and Claims - Account Balances by Guaranteed Minimum Interest Rates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/PolicyholderAccountBalancesFuturePolicyBenefitsandClaimsAccountBalancesbyGuaranteedMinimumInterestRatesDetails</Role>
      <ShortName>Policyholder Account Balances, Future Policy Benefits and Claims - Account Balances by Guaranteed Minimum Interest Rates (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9955559 - Disclosure - Policyholder Account Balances, Future Policy Benefits and Claims - Balances of and Changes in Liability for Future Policy Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/PolicyholderAccountBalancesFuturePolicyBenefitsandClaimsBalancesofandChangesinLiabilityforFuturePolicyBenefitsDetails</Role>
      <ShortName>Policyholder Account Balances, Future Policy Benefits and Claims - Balances of and Changes in Liability for Future Policy Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>9955560 - Disclosure - Policyholder Account Balances, Future Policy Benefits and Claims - Additional Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/PolicyholderAccountBalancesFuturePolicyBenefitsandClaimsAdditionalLiabilitiesDetails</Role>
      <ShortName>Policyholder Account Balances, Future Policy Benefits and Claims - Additional Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>9955561 - Disclosure - Policyholder Account Balances, Future Policy Benefits and Claims - Amounts Recognized in Statement of Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/PolicyholderAccountBalancesFuturePolicyBenefitsandClaimsAmountsRecognizedinStatementofOperationsDetails</Role>
      <ShortName>Policyholder Account Balances, Future Policy Benefits and Claims - Amounts Recognized in Statement of Operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>9955562 - Disclosure - Policyholder Account Balances, Future Policy Benefits and Claims - Change in Unearned Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/PolicyholderAccountBalancesFuturePolicyBenefitsandClaimsChangeinUnearnedIncomeDetails</Role>
      <ShortName>Policyholder Account Balances, Future Policy Benefits and Claims - Change in Unearned Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>9955563 - Disclosure - Separate Account Assets and Liabilities - Separate Account Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/SeparateAccountAssetsandLiabilitiesSeparateAccountAssetsDetails</Role>
      <ShortName>Separate Account Assets and Liabilities - Separate Account Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>9955564 - Disclosure - Separate Account Assets and Liabilities - Separate Account Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/SeparateAccountAssetsandLiabilitiesSeparateAccountLiabilitiesDetails</Role>
      <ShortName>Separate Account Assets and Liabilities - Separate Account Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>9955565 - Disclosure - Market Risk Benefits - Balances of and Changes in Market Risk Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/MarketRiskBenefitsBalancesofandChangesinMarketRiskBenefitsDetails</Role>
      <ShortName>Market Risk Benefits - Balances of and Changes in Market Risk Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>9955566 - Disclosure - Market Risk Benefits - Significant Inputs and Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/MarketRiskBenefitsSignificantInputsandAssumptionsDetails</Role>
      <ShortName>Market Risk Benefits - Significant Inputs and Assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>9955567 - Disclosure - Debt - Balances and Stated Interest Rates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DebtBalancesandStatedInterestRatesDetails</Role>
      <ShortName>Debt - Balances and Stated Interest Rates (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>9955568 - Disclosure - Debt - Short-term Borrowings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DebtShorttermBorrowingsDetails</Role>
      <ShortName>Debt - Short-term Borrowings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>9955569 - Disclosure - Debt - Revolving Credit Facility (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DebtRevolvingCreditFacilityDetails</Role>
      <ShortName>Debt - Revolving Credit Facility (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>9955570 - Disclosure - Fair Values of Assets and Liabilities - Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FairValuesofAssetsandLiabilitiesRecurringBasisDetails</Role>
      <ShortName>Fair Values of Assets and Liabilities - Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>9955571 - Disclosure - Fair Values of Assets and Liabilities - Changes in Level 3 Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FairValuesofAssetsandLiabilitiesChangesinLevel3AssetsDetails</Role>
      <ShortName>Fair Values of Assets and Liabilities - Changes in Level 3 Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>9955572 - Disclosure - Fair Values of Assets and Liabilities - Changes in Level 3 Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FairValuesofAssetsandLiabilitiesChangesinLevel3LiabilitiesDetails</Role>
      <ShortName>Fair Values of Assets and Liabilities - Changes in Level 3 Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>9955573 - Disclosure - Fair Values of Assets and Liabilities - Significant Unobservable inputs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FairValuesofAssetsandLiabilitiesSignificantUnobservableinputsDetails</Role>
      <ShortName>Fair Values of Assets and Liabilities - Significant Unobservable inputs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>9955574 - Disclosure - Fair Values of Assets and Liabilities - Non-Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FairValuesofAssetsandLiabilitiesNonRecurringBasisDetails</Role>
      <ShortName>Fair Values of Assets and Liabilities - Non-Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>9955575 - Disclosure - Fair Values of Assets and Liabilities - Financial Instruments Not Reported at Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/FairValuesofAssetsandLiabilitiesFinancialInstrumentsNotReportedatFairValueDetails</Role>
      <ShortName>Fair Values of Assets and Liabilities - Financial Instruments Not Reported at Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>9955576 - Disclosure - Offsetting Assets and Liabilities - Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/OffsettingAssetsandLiabilitiesAssetsDetails</Role>
      <ShortName>Offsetting Assets and Liabilities - Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>9955577 - Disclosure - Offsetting Assets and Liabilities - Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/OffsettingAssetsandLiabilitiesLiabilitiesDetails</Role>
      <ShortName>Offsetting Assets and Liabilities - Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>9955578 - Disclosure - Derivatives and Hedging Activities - Notional Value and Gross Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DerivativesandHedgingActivitiesNotionalValueandGrossFairValueDetails</Role>
      <ShortName>Derivatives and Hedging Activities - Notional Value and Gross Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>9955579 - Disclosure - Derivatives and Hedging Activities - Derivatives Not Designated as Hedges Impact (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DerivativesandHedgingActivitiesDerivativesNotDesignatedasHedgesImpactDetails</Role>
      <ShortName>Derivatives and Hedging Activities - Derivatives Not Designated as Hedges Impact (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>9955580 - Disclosure - Derivatives and Hedging Activities - Deferred Premium, Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DerivativesandHedgingActivitiesDeferredPremiumOptionsDetails</Role>
      <ShortName>Derivatives and Hedging Activities - Deferred Premium, Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>9955581 - Disclosure - Derivatives and Hedging Activities - Hedges and Credit Risk (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/DerivativesandHedgingActivitiesHedgesandCreditRiskDetails</Role>
      <ShortName>Derivatives and Hedging Activities - Hedges and Credit Risk (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>9955582 - Disclosure - Shareholders' Equity - OCI Components (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/ShareholdersEquityOCIComponentsDetails</Role>
      <ShortName>Shareholders' Equity - OCI Components (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>9955583 - Disclosure - Shareholders' Equity - Changes in AOCI Components (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/ShareholdersEquityChangesinAOCIComponentsDetails</Role>
      <ShortName>Shareholders' Equity - Changes in AOCI Components (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>9955584 - Disclosure - Shareholders' Equity - Shares Repurchased and Reissued (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/ShareholdersEquitySharesRepurchasedandReissuedDetails</Role>
      <ShortName>Shareholders' Equity - Shares Repurchased and Reissued (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>9955585 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/IncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/IncomeTaxes</ParentRole>
      <Position>103</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>9955586 - Disclosure - Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/ContingenciesDetails</Role>
      <ShortName>Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/Contingencies</ParentRole>
      <Position>104</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>9955587 - Disclosure - Earnings per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/EarningsperShareDetails</Role>
      <ShortName>Earnings per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.ameriprise.com/role/EarningsperShareTables</ParentRole>
      <Position>105</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>9955588 - Disclosure - Segment Information - Reportable Segments and Total Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/SegmentInformationReportableSegmentsandTotalAssetsDetails</Role>
      <ShortName>Segment Information - Reportable Segments and Total Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>9955589 - Disclosure - Segment Information - Net Revenues and Operating Earnings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/SegmentInformationNetRevenuesandOperatingEarningsDetails</Role>
      <ShortName>Segment Information - Net Revenues and Operating Earnings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="amp-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>9955590 - Disclosure - Segment Information - Significant Expense Categories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ameriprise.com/role/SegmentInformationSignificantExpenseCategoriesDetails</Role>
      <ShortName>Segment Information - Significant Expense Categories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</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-Q" isDefinitelyFs="true" isUsgaap="true" original="amp-20260331.htm">amp-20260331.htm</File>
    <File>amp-20260331.xsd</File>
    <File>amp-20260331_cal.xml</File>
    <File>amp-20260331_def.xml</File>
    <File>amp-20260331_lab.xml</File>
    <File>amp-20260331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2025</BaseTaxonomy>
    <BaseTaxonomy items="4332">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="29">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
