Schedule of Assets (Held at End of Year) - Schedule of Assets (Details) - EBP 005	12 Months Ended
Dec. 31, 2025 USD ($)
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Entity Tax Identification Number	54-1229715
Employee Benefit Plan, Plan Number	005
Employee benefit plan, asset held for investment, participant loan, interest rate	1.00%
Current Value	$ 250,449,827
Employee Benefit Plan, Asset Held for Investment, Participant Loan, after Deemed Distribution	$ 10,722,711
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
Total assets (held at end of year)	$ 261,172,538
Minimum
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee benefit plan, asset held for investment, participant loan, interest rate	4.25%
Employee Benefit Plan Participant Loans Maturity Year	2026
Maximum
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Employee benefit plan, asset held for investment, participant loan, interest rate	9.50%
Employee Benefit Plan Participant Loans Maturity Year	2030
Common/Collective Trust Funds
Employee Benefit Plan, Schedule of Asset Held for Investment [Line Items]
Current Value	$ 138,631,899
Investment, Identifier [Axis]: Bank of New York Mellon, BNY EB Temporary Investment Fund
Employee Benefit Plan, 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	$ 418,934
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
Investment, Identifier [Axis]: Capital Group, EuroPacific Growth Fund
Employee Benefit Plan, 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	$ 7,584,415
Investment, Identifier [Axis]: Dominion Energy, Inc., Dominion Energy Common Stock
Employee Benefit Plan, 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]	Dominion Energy common stock
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration]	us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value	$ 111,817,928
EBP, Asset Held for Investment, Party-in-Interest [true false]	true
Investment, Identifier [Axis]: Fidelity Investments, FIAM Small Cap Core Commingled Pool
Employee Benefit Plan, 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	$ 727,328
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2025 Trust Plus
Employee Benefit Plan, 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	$ 9,514,028
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2030 Trust Plus
Employee Benefit Plan, 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	$ 12,537,982
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2035 Trust Plus
Employee Benefit Plan, 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	$ 13,083,624
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2040 Trust Plus
Employee Benefit Plan, 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	$ 15,043,992
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2045 Trust Plus
Employee Benefit Plan, 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	$ 18,137,561
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2050 Trust Plus
Employee Benefit Plan, 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	$ 23,997,121
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2055 Trust Plus
Employee Benefit Plan, 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	$ 17,254,667
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2060 Trust Plus
Employee Benefit Plan, 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	$ 8,901,379
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2065 Trust Plus
Employee Benefit Plan, 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	$ 6,262,937
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement 2070 Trust Plus
Employee Benefit Plan, 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	$ 905,143
Investment, Identifier [Axis]: The Vanguard Group, Inc., Target Retirement Income & Growth Trust Plus
Employee Benefit Plan, 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	$ 4,262,788

Employee benefit plan participant loans maturity year.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-SubTopic 205
-Topic 962
-Publisher FASB
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
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-Publisher DOL-EBSA

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- Definition

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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- Definition

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)).

+ References

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- Definition

Indicates (true false) whether asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) was transacted with party-in-interest.

+ References

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
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-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
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- Definition

Indicates type of investment at current value held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
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-Section S99
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-Name Employee Retirement Income Security Act of 1974
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Interest rate on 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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- Definition

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
-SubTopic 205
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
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