Application date of public utilities transmission.

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- Definition

Asset Impairment Charges After Tax

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- Definition

Increase decrease in annual base fuel component recoveries.

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- Definition

Kilo Volt Line.

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No definition available.

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- Definition

Public energy efficiency programs cost rate adjustment approval request to recover amount.

+ References

No definition available.

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- Definition

Public utilities authorized return on equity percentage.

+ References

No definition available.

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- Definition

Public utilities energy efficiency upgrades and critical health and safety repairs.

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- Definition

Public utilities, length of transmission line.

+ References

No definition available.

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- Definition

Public utilities, property, plant and equipment, expected cost of construction.

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- Definition

Public Utilities Proposed Earned Return On Equity Percentage

+ References

No definition available.

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- Definition

Public Utilities, requested rate increase amortization of certain excess deferred income taxes.

+ References

No definition available.

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- Definition

Public utilities, retail electric customer balance.

+ References

No definition available.

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- Definition

Public utilities, start date of proposed rate in month and year.

+ References

No definition available.

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482130/360-10-45-4

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- Definition

Percentage of public utility's approved return on equity.

+ References

No definition available.

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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.

+ References

No definition available.

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- Definition

Amount of public utility's requested rate increase (decrease) with regulatory agency.

+ References

No definition available.

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- Definition

The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 340
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481878/980-340-50-1

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Regulatory Matters (Narrative) (Detail 3) $ in Millions	1 Months Ended									12 Months Ended
Regulatory Matters (Narrative) (Detail 3) $ in Millions	Feb. 23, 2024 USD ($)	Jan. 31, 2024 USD ($)	Sep. 30, 2023 USD ($)	Apr. 30, 2023 USD ($)	Mar. 31, 2023 USD ($) mi kV	Feb. 28, 2023 USD ($)	Jan. 31, 2023 USD ($)	Mar. 31, 2022	Aug. 31, 2021 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Public Utilities, General Disclosures [Line Items]
Regulatory assets										$ 9,665	$ 10,148
Impairment of assets and other charges										$ 307	$ 1,401	$ 194
South Carolina Regulation \| Electric Base Rate Case
Public Utilities, General Disclosures [Line Items]
Increase (decrease) in revenue requirement									$ 62
Approved return on equity percentage									9.50%
Public utilities, requested rate increase amortization of certain excess deferred income taxes									$ 36
Public utilities, retail electric customer balance									15
Public utilities energy efficiency upgrades and critical health and safety repairs									$ 15
Regulatory assets												237
South Carolina Regulation \| Electric Base Rate Case \| Impairment of Assets and Other Charges (Benefits)
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges												249
Impairment of assets and other charges after tax												187
South Carolina Regulation \| Electric Base Rate Case \| Other income (expense)
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges												18
Impairment of assets and other charges after tax												$ 14
Dominion Energy South Carolina Inc \| South Carolina Regulation \| Electric DSM Programs
Public Utilities, General Disclosures [Line Items]
Public energy efficiency programs cost rate adjustment approval request to recover amount							$ 46
Application date							2023-01
Dominion Energy South Carolina Inc \| South Carolina Regulation \| Electric DSM Programs \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Public energy efficiency programs cost rate adjustment approval request to recover amount		$ 47
Application date		2024-01
Dominion Energy South Carolina Inc \| South Carolina Regulation \| Natural Gas Base Rate Member
Public Utilities, General Disclosures [Line Items]
Increase (decrease) in revenue requirement			$ 9		$ 19
Percentage of proposed earned return					10.38%
Authorized return percentage			9.49%					10.25%
Dominion Energy South Carolina Inc \| South Carolina Regulation \| Cost of Fuel
Public Utilities, General Disclosures [Line Items]
Application date						2023-02
Rate year beginning						2023-05
Increase (decrease) in annual base fuel component recoveries					$ 121	$ 176
Dominion Energy South Carolina Inc \| South Carolina Regulation \| Cost of Fuel \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Application date	2024-02
Rate year beginning	2024-05
Increase (decrease) in annual base fuel component recoveries	$ (315)
Dominion Energy South Carolina Inc \| South Carolina Regulation \| Electric Transmission Project
Public Utilities, General Disclosures [Line Items]
Application date					2023-03
Cost Estimate					$ 55
Miles of Lines \| mi					19
Type of Line \| kV					230
Dominion Energy South Carolina Inc \| South Carolina Regulation \| Electric - Other
Public Utilities, General Disclosures [Line Items]
Increase (decrease) in revenue requirement				$ 24