v3.26.3
Significant Accounting Policies (Reconciliation of Total Cash, Restricted Cash and Equivalents) (Detail) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Dec. 31, 2024
Cash Cash Equivalents And Restricted Cash [Line Items]        
Cash and cash equivalents $ 435 $ 250 $ 932 $ 310
Cash and cash equivalents [1] 435 250 [2]    
Restricted cash and equivalents [3],[4] 128 93 134 55
Cash, restricted cash and equivalents shown in the Consolidated Statements of Cash Flows 563 343 1,066 365
Virginia Electric and Power Company        
Cash Cash Equivalents And Restricted Cash [Line Items]        
Cash and cash equivalents 242 [5] 170 [5],[6] 646 160
Restricted cash and equivalents [3],[4] 120 61 125 46
Cash, restricted cash and equivalents shown in the Consolidated Statements of Cash Flows $ 362 $ 231 $ 771 $ 206
[1] See Note 14 for amounts attributable to VIEs.
[2] Dominion Energy’s Consolidated Balance Sheet at December 31, 2025 has been derived from the audited Consolidated Balance Sheet at that date.
[3] Includes $104 million, $115 million, $51 million and $41 million at VPFS attributable to VIEs at September 30, 2026, September 30, 2025, December 31, 2025 and December 31, 2024, respectively.
[4] Restricted cash and equivalents balances are presented within other current assets in the Companies’ Consolidated Balance Sheets.
[5] See Note 14 for amounts attributable to VIEs.
[6] Virginia Power’s Consolidated Balance Sheet at December 31, 2025 has been derived from the audited Consolidated Balance Sheet at that date.