SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR) (Details) - Dillard's, Inc. Investment & Employee Stock Ownership Plan	12 Months Ended
Dec. 31, 2025 USD ($) $ / shares
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
Employer Identification Number	71-0388071
Plan number	111
Notes receivable from participants, Current Value	$ 7,382,583
Total Assets Held for Investment, Current Value	$ 3,611,262,274
Investment, Identifier [Axis]: American Funds, American Funds EuroPacific Growth Fund R6
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:AmericanFundsMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual funds
Current Value	$ 26,976,504
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: American Funds, American Funds Washington Mutual Investors R6 Fund
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:AmericanFundsMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual funds
Current Value	$ 76,506,116
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: DFA, DFA US Small Cap Value Portfolio Inst Fund
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:DfaMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual funds
Current Value	$ 20,072,332
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: DFA, DFA World ex U.S. Core Equity Index Inst Fund
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:DfaMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual funds
Current Value	$ 23,095,015
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Dillard’s, Inc, Common Stock
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:DillardsIncMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanEmployerCommonStockFundMember
Par value \| $ / shares	$ 0.01
Current Value	$ 2,742,549,187
Party-in-interest	true
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Dodge & Cox, Dodge & Cox Income X
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:DodgeCoxMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual funds
Current Value	$ 85,442,739
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Harbor Funds, Harbor Capital Appreciation CIT Class 4
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:HarborFundsMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Collective trust funds
Current Value	$ 92,763,091
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: JP Morgan, JP Morgan Mid Cap Equity R6 Fund
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:JpMorganMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual funds
Current Value	$ 42,709,216
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: SEI Trust Company, Galliard Stable Return Fund X
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:SeiTrustCompanyMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Collective trust funds
Current Value	$ 177,136,062
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street, State Street Global All Cap Equity ex-US Index SL Class II
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:StateStreetMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Collective trust funds
Current Value	$ 41,269,500
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street, State Street Russell Small/Mid Cap Index SL Class II
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:StateStreetMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Collective trust funds
Current Value	$ 17,518,037
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street, State Street S&P 500 Index SL Class II
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:StateStreetMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Collective trust funds
Current Value	$ 168,810,711
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street, State Street U.S. Bond Index SL Class XIV
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:StateStreetMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Collective trust funds
Current Value	$ 43,845,707
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street, State Street U.S. Inflation Protected Bond Index SL Class II
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:StateStreetMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Collective trust funds
Current Value	$ 30,819,682
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: T. Rowe Price, T. Rowe Price Integrated US Small Cap Growth Equity Fund I
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
EBP, Investment, Issuer Name [Extensible Enumeration]	dds:T.RowePriceMember
EBP, Investment, Current Value, Type [Extensible Enumeration]	Mutual funds
Current Value	$ 14,365,792
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Mutual funds
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
Current Value	$ 289,167,714
Collective trust funds
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
Current Value	$ 572,162,790
Minimum
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
Notes receivable from participants, Interest rate	4.25%
Maximum
SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
Notes receivable from participants, Interest rate	9.50%

Face amount or stated value per share of common stock.

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- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
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Amount of total assets in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, current value of investment, participant loan, and plan interest in master trust.

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Current value of investment, excluding plan interest in master trust, in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract.

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Indicates status of participation by participant for investment, excluding plan interest in master trust, in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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Amount, after deemed distribution, of participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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Indicates name of issuer of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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Indicates type of investment at current value held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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Plan number of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), in three-digit numeric format.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
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