Inventory write down, after tax.

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- Definition

Public utilities authorized return on equity percentage.

+ References

No definition available.

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- Definition

[Line Items] for Significant Accounting Policies [Table]

+ References

No definition available.

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- Definition

The excess of replacement or current cost over the stated LIFO (last in first out) inventory value when the LIFO inventory method is utilized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(c))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 330
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483080/330-10-50-2

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- Definition

The amount of LIFO (last in first out) inventory present at the reporting date when inventory is also valued using different valuation methods.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483489/210-10-50-1

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- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

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Significant Accounting Policies (Narrative) (Detail 2) - USD ($) $ in Millions	1 Months Ended		12 Months Ended	24 Months Ended
	Jul. 31, 2023	Apr. 30, 2023	Dec. 31, 2022	Dec. 31, 2024	Dec. 31, 2022	Dec. 31, 2023	Jan. 31, 2022
Significant Accounting Policies [Line Items]
Finite Lived Intangible Asset Useful Life						35 years
Impairment of Assets and Other Charges
Significant Accounting Policies [Line Items]
Inventory balances wrote off			$ 40
Inventory balances wrote off, after tax			30
Minimum
Significant Accounting Policies [Line Items]
Lease extend term						1 year
Maximum
Significant Accounting Policies [Line Items]
Lease extend term						70 years
Virginia Electric and Power Company
Significant Accounting Policies [Line Items]
Finite Lived Intangible Asset Useful Life							35 years
Virginia Electric and Power Company \| Biennial Review
Significant Accounting Policies [Line Items]
Authorized return percentage	9.35%	9.35%
Virginia Electric and Power Company \| Triennial Review
Significant Accounting Policies [Line Items]
Authorized return percentage		70.00%			70.00%
Virginia Electric and Power Company \| Forecast \| Biennial Review
Significant Accounting Policies [Line Items]
Authorized return percentage				9.70%
Virginia Electric and Power Company \| Impairment of Assets and Other Charges
Significant Accounting Policies [Line Items]
Inventory balances wrote off			19
Inventory balances wrote off, after tax			14
Dominion Energy Gas Holdings, LLC
Significant Accounting Policies [Line Items]
Inventory under LIFO method			14		$ 14	$ 18
Amount exceeded on LIFO basis			$ 129		$ 129	$ 42