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Related-Party Transactions (Detail) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Sep. 30, 2024

Sep. 30, 2023

Sep. 30, 2024

Sep. 30, 2023

Related Party Transaction [Line Items]

Services provided to affiliates

$ 3,941

$ 3,810

$ 11,059

$ 10,859

Virginia Electric and Power Company

Related Party Transaction [Line Items]

Services provided to affiliates

^[1]

2,762

2,645

7,788

7,281

Virginia Electric and Power Company | Affiliated Entity

Related Party Transaction [Line Items]

Commodity purchases from affiliates

147

146

453

463

Virginia Electric and Power Company | Related Party

Related Party Transaction [Line Items]

Services provided by affiliates

^[2]

169

149

495

441

Services provided to affiliates

$ 4

$ 7

$ 12

$ 15

[1]	See Note 19 for amounts attributable to affiliates.
[2]	Includes capitalized expenditures of $59 million and $51 million for the three months ended September 30, 2024 and 2023, respectively and $170 million and $151 million for the nine months ended September 30, 2024 and 2023, respectively.

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