Capacity of facility of company owned solar distribution generation facilities.

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Date of agreement closed.

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Date of agreement entered.

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Date of expected commercial operations.

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Easement charges after tax.

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Easement charges before tax.

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Gain loss on sale of property plant equipment after tax.

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Payment of project easement cost.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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The cash outflow from the amount invested for projects in hopes of getting a future return or interest from it.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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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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Property, Plant and Equipment (Narrative) (Detail) $ in Millions		1 Months Ended	3 Months Ended	9 Months Ended
	Nov. 08, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($) MW	Sep. 30, 2022 USD ($)
Property, Plant and Equipment [Line Items]
Project Cost				$ 14	$ 139
Virginia Electric and Power Company
Property, Plant and Equipment [Line Items]
Project Cost				$ 14	51
Forecast \| Virginia Electric and Power Company \| Virginia Power Easement Agreement
Property, Plant and Equipment [Line Items]
Easement charges after tax			$ 49
Easement charges before tax			$ 65
Subsequent Event \| Virginia Electric and Power Company \| Virginia Power Easement Agreement
Property, Plant and Equipment [Line Items]
Project easement cost paid	$ 65
Acquisition of Solar Project Foxhound Virginia
Property, Plant and Equipment [Line Items]
Date Agreement Entered				2023-03
Date Agreement Closed				Excepted 2024
Project Cost				$ 205
Date of Commercial Operations				Excepted 2024
MW Capacity \| MW				83
Utility Property
Property, Plant and Equipment [Line Items]
Sale of utility property		$ 16
Gain on sale of asset					16
Gain on sale of asset after tax					$ 12