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Variable Interest Entities - Schedule of Balance Sheet Included Balances for VPFS and OSWP (Detail) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Sep. 30, 2024
Dec. 31, 2023
Assets        
Cash and cash equivalents [1] $ 932 $ 310 [2]    
Customer receivables [1] 2,285 2,169 [2]    
Prepayments [1] 802 315 [2]    
Regulatory assets-current [1] 1,430 992 [2]    
Property, plant and equipment 75,810 68,862 [2] $ 18  
Other Assets, Current [1] 340 269 [2]    
Regulatory assets-noncurrent [1] 8,012 8,288 [2]    
Other deferred charges and other assets [1] 4,035 3,860 [2]    
Total assets 111,597 102,415 [2]    
Liabilities        
Securities due within one year [3] 2,736 1,725 [4]    
Accounts payable [1] 1,007 1,149 [4]    
Accrued interest, payroll and taxes [3] 1,209 1,045 [4]    
Other current liabilities [3],[5] 1,655 2,084 [4]    
Securitization bonds 43,291 37,525 [4]    
Other deferred credits and other liabilities [3] 8,759 8,528 [4]    
Total liabilities 79,871 72,613 [4]    
Virginia Electric and Power Company        
Assets        
Cash and cash equivalents 646 [6] 160 [6],[7] $ 28 $ 90
Customer receivables [6] 1,759 1,612 [7]    
Regulatory assets-current [6] 1,140 697 [7]    
Property, plant and equipment 58,189 52,517 [7]    
Other Assets, Current [6] 261 194 [7]    
Regulatory assets-noncurrent [6] 4,283 4,537 [7]    
Other deferred charges and other assets [6],[8] 3,196 2,662 [7]    
Total assets 75,905 68,387 [7]    
Liabilities        
Securities due within one year [6] 959 548 [7]    
Accounts payable [6] 655 660 [7]    
Accrued interest, payroll and taxes [6] 509 366 [7]    
Other current liabilities [6],[8] 1,382 1,549 [7]    
Securitization bonds 22,162 20,038 [7]    
Other deferred credits and other liabilities [6],[8] 6,585 6,275 [7]    
Total liabilities 44,537 43,291 [7]    
Variable Interest Entity Not Primary Beneficiary | Virginia Electric and Power Company        
Assets        
Prepayments [9] 0 0    
Regulatory assets-current 118 124    
Other Assets, Current [10] 115 41    
Regulatory assets-noncurrent 912 1,040    
Total assets 1,145 1,205    
Liabilities        
Securities due within one year 167 163    
Accrued interest, payroll and taxes 25 10    
Securitization bonds 969 1,054    
Total liabilities 1,161 1,227    
Variable Interest Entity Not Primary Beneficiary | OSWP        
Assets        
Cash and cash equivalents 192 70    
Customer receivables 0 0    
Prepayments [11] 0 10    
Regulatory assets-current 21 6    
Property, plant and equipment 7,934 5,844    
Regulatory assets-noncurrent 118 52    
Other deferred charges and other assets 4 0    
Total assets 8,269 5,982    
Liabilities        
Accounts payable 1 0    
Accrued interest, payroll and taxes 1 0    
Other current liabilities 7 0    
Asset retirement obligations - noncurrent [12] 167 38    
Other deferred credits and other liabilities 0 0    
Total liabilities $ 176 $ 38    
[1] See Note 15 for amounts attributable to VIEs.
[2] Dominion Energy’s Consolidated Balance Sheet at December 31, 2024 has been derived from the audited Consolidated Balance Sheet at that date.
[3] See Note 15 for amounts attributable to VIEs.
[4] Dominion Energy’s Consolidated Balance Sheet at December 31, 2024 has been derived from the audited Consolidated Balance Sheet at that date.
[5] See Note 10 for amounts attributable to related parties.
[6] See Note 15 for amounts attributable to VIEs.
[7] Virginia Power’s Consolidated Balance Sheet at December 31, 2024 has been derived from the audited Consolidated Balance Sheet at that date.
[8] See Note 19 for amounts attributable to affiliates.
[9] Prepayments are presented in other current assets in Virginia Power’s Consolidated Balance Sheets.
[10] See Note 2 for additional information about restricted cash and equivalents at VPFS.
[11] Prepayments are presented in other current assets in Virginia Power’s Consolidated Balance Sheets.
[12] Asset retirement obligation-noncurrent are presented in other deferred credits and other liabilities in the Companies’ Consolidated Balance Sheets.