v3.26.3
Related-Party Transactions (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Related Party Transaction [Line Items]        
Services provided to affiliates $ 5,617 $ 4,527 $ 15,116 $ 12,413
Virginia Electric and Power Company        
Related Party Transaction [Line Items]        
Commodity purchases from affiliates 170 221 983 734
Services provided to affiliates [1] 4,218 3,311 11,335 8,788
Virginia Electric and Power Company | Related Party        
Related Party Transaction [Line Items]        
Services provided by affiliates [2],[3] 239 203 718 608
Services provided to affiliates $ 4 $ 4 $ 13 $ 11
[1] See Note 18 for amounts attributable to affiliates.
[2] Excludes amounts related to Virginia Power's operating lease with an affiliated entity as discussed below.
[3] Includes capitalized expenditures of $92 million and $76 million for the three months ended September 30, 2026 and 2025, respectively, and $270 million and $222 million for the nine months ended September 30, 2026 and 2025, respectively.