v3.26.1
Schedule of Assets (Held at End of Year) - Schedule of Assets (Details) - EBP 001
12 Months Ended
Dec. 31, 2025
USD ($)
EBP, Schedule of Asset Held for Investment [Line Items]  
Entity Tax Identification Number 54-1229715
EBP, Plan Number 001
Current Value $ 2,227,498,061
EBP, Asset Held for Investment, Party-in-Interest [true false] true
EBP, Asset Held for Investment, Participant Loan, Interest Rate 1.00%
EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution $ 39,745,397
Total assets (held at end of year) 2,267,243,458
Common Collective Trust Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 1,568,230,753
Maximum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan Participant Loan Maturity Year 2030
EBP, Asset Held for Investment, Participant Loan, Interest Rate 9.50%
Minimum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Employee Benefit Plan Participant Loan Maturity Year 2026
EBP, Asset Held for Investment, Participant Loan, Interest Rate 4.25%
Investment, Identifier [Axis]: Bank of New York Mellon, BNY EB Temporary Investment Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Bank Of New York Mellon [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 205,506
EBP, Asset Held for Investment, Party-in-Interest [true false] true
Investment, Identifier [Axis]: Capital Group, EuroPacific Growth Trust  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Capital Group [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 135,460,877
Investment, Identifier [Axis]: Charles Schwab, Schwab Personal Choice Retirement Account  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Charles Schwab [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Defined Benefit Plan Retirement Account [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 67,226,753
Investment, Identifier [Axis]: Dominion Energy, Inc., Dominion Energy Common Stock  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Dominion Energy Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanEmployerCommonStockMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 592,040,555
EBP, Asset Held for Investment, Party-in-Interest [true false] true
Investment, Identifier [Axis]: Fidelity Investments, FIAM Small Cap Core Commingled Pool  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Investments [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 12,111,765
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2025 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 144,563,172
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2030 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 204,981,646
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2035 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 203,391,328
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2040 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 165,585,791
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2045 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 180,225,100
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2050 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 180,500,793
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2055 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 112,045,209
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2060 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 51,988,900
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2065 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 32,036,418
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2070 Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 6,343,718
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement Income & Growth Trust Plus  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] The Vanguard Group Inc [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Common Collective Trust Funds
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 138,790,530