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- Definition

Increase Decrease In Earnings Per Share

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- Definition

[Line Items] for Significant Accounting Policies [Table]

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- Definition

Utilities operating expense, increase (decrease) in depreciation and amortization.

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- Definition

Utilities operating expense, increase (decrease) in depreciation and amortization, after tax.

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- Definition

Amount of asset retirement obligations incurred during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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Significant Accounting Policies (Narrative) (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Dec. 31, 2022
Other Operations and Maintenance
Significant Accounting Policies [Line Items]
Asset retirement obligation, liabilities incurred		$ 44
Asset retirement obligation, liabilities incurred after tax		$ 35
Change in Depreciation Rates from New Depreciation Study
Significant Accounting Policies [Line Items]
Increase in EPS	$ 0.01		$ 0.03
Change in Depreciation Rates from New Depreciation Study \| Forecast
Significant Accounting Policies [Line Items]
Increase in EPS				$ 0.05
Virginia Electric and Power Company \| Change in Depreciation Rates from New Depreciation Study
Significant Accounting Policies [Line Items]
Increase (decrease) in depreciation expense	$ (15)		$ (30)
Increase (decrease) in depreciation expense, after tax	$ (11)		$ (22)
Virginia Electric and Power Company \| Change in Depreciation Rates from New Depreciation Study \| Forecast
Significant Accounting Policies [Line Items]
Increase (decrease) in depreciation expense				$ (60)
Increase (decrease) in depreciation expense, after tax				$ (45)
Four Brothers And Three Cedars \| Dominion Energy Midstream Partners, LP \| Terra Nova Renewable Partners \| Nonregulated Solar Projects
Significant Accounting Policies [Line Items]
Percentage of equity interest sold to noncontrolling interest owners	33.00%		33.00%