<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>57</ContextCount>
  <ElementCount>92</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>15</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/StatementStatementsOfNetAssetsAvailableForBenefits</Role>
      <ShortName>STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00200 - Statement - STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/StatementStatementOfChangesInNetAssetsAvailableForBenefits</Role>
      <ShortName>STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>10101 - Disclosure - DESCRIPTION OF PLAN</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureDescriptionOfPlan</Role>
      <ShortName>DESCRIPTION OF PLAN</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>10201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>10301 - Disclosure - FAIR VALUE MEASUREMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureFairValueMeasurements</Role>
      <ShortName>FAIR VALUE MEASUREMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>10401 - Disclosure - RELATED PARTY AND PARTY-IN-INTEREST TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureRelatedPartyAndPartyInInterestTransactions</Role>
      <ShortName>RELATED PARTY AND PARTY-IN-INTEREST TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>10501 - Disclosure - TAX STATUS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureTaxStatus</Role>
      <ShortName>TAX STATUS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>10601 - Disclosure - SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>SUBSEQUENT EVENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10701 - Disclosure - SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureScheduleHPartIvLine4iScheduleOfAssetsHeldAtEndOfYear</Role>
      <ShortName>SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>20202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>30303 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureFairValueMeasurementsTables</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.dillards.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>12</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>40101 - Disclosure - DESCRIPTION OF PLAN - Contributions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureDescriptionOfPlanContributionsDetails</Role>
      <ShortName>DESCRIPTION OF PLAN - Contributions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>40102 - Disclosure - DESCRIPTION OF PLAN - Vesting, Forfeitures, Payment of benefits and Withdrawals Prior to Termination (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureDescriptionOfPlanVestingForfeituresPaymentOfBenefitsAndWithdrawalsPriorToTerminationDetails</Role>
      <ShortName>DESCRIPTION OF PLAN - Vesting, Forfeitures, Payment of benefits and Withdrawals Prior to Termination (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>40103 - Disclosure - DESCRIPTION OF PLAN - Plan Termination, Notes Receivable from Participants (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dillards.com/role/DisclosureDescriptionOfPlanPlanTerminationNotesReceivableFromParticipantsDetails</Role>
      <ShortName>DESCRIPTION OF PLAN - Plan Termination, Notes Receivable from Participants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>40301 - Disclosure - FAIR VALUE MEASUREMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureFairValueMeasurementsDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.dillards.com/role/DisclosureFairValueMeasurementsTables</ParentRole>
      <Position>16</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>40401 - Disclosure - RELATED PARTY AND PARTY-IN-INTEREST TRANSACTIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureRelatedPartyAndPartyInInterestTransactionsDetails</Role>
      <ShortName>RELATED PARTY AND PARTY-IN-INTEREST TRANSACTIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.dillards.com/role/DisclosureRelatedPartyAndPartyInInterestTransactions</ParentRole>
      <Position>17</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>40501 - Disclosure - TAX STATUS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureTaxStatusDetails</Role>
      <ShortName>TAX STATUS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.dillards.com/role/DisclosureTaxStatus</ParentRole>
      <Position>18</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>40601 - Disclosure - SUBSEQUENT EVENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureSubsequentEventsDetails</Role>
      <ShortName>SUBSEQUENT EVENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.dillards.com/role/DisclosureSubsequentEvents</ParentRole>
      <Position>19</Position>
    </Report>
    <Report instance="dds-20251231x11k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>40701 - Disclosure - SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dillards.com/role/DisclosureScheduleHPartIvLine4iScheduleOfAssetsHeldAtEndOfYearDetails</Role>
      <ShortName>SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.dillards.com/role/DisclosureScheduleHPartIvLine4iScheduleOfAssetsHeldAtEndOfYear</ParentRole>
      <Position>20</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>dds-20251231.xsd</File>
    <File>dds-20251231_cal.xml</File>
    <File>dds-20251231_def.xml</File>
    <File>dds-20251231_lab.xml</File>
    <File>dds-20251231_pre.xml</File>
    <File doctype="11-K" isDefinitelyFs="true" isUsgaap="true" original="dds-20251231x11k.htm">dds-20251231x11k.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="159">http://fasb.org/us-gaap-ebp/2026</BaseTaxonomy>
    <BaseTaxonomy items="9">http://xbrl.sec.gov/dei/2026</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
