v3.25.2
Significant Accounting Policies (Schedule of Revision of Previously Issued Consolidated Statements of Equity) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance $ 30,349 $ 27,120 $ 29,802 [1] $ 27,264
Net income including noncontrolling interests 814 563 1,525 966
Other comprehensive income (loss), net of tax 5 11 7 8
Ending balance 30,872 26,717 30,872 26,717
Retained Earnings        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance 1,727 1,749 1,641 1,925
Net income including noncontrolling interests 760 563 1,425 966
Ending balance 1,906 1,724 1,906 1,724
Accumulated other comprehensive income (loss)        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance (150) (175) (152) (172)
Other comprehensive income (loss), net of tax 5 11 7 8
Ending balance (145) (164) (145) (164)
Shareholder's Equity        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance 26,992 27,120 26,863 27,264
Net income including noncontrolling interests 760 563 1,425 966
Other comprehensive income (loss), net of tax 5 11 7 8
Ending balance 27,215 26,717 27,215 26,717
As Previously Reported        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   27,457 30,192 27,567
Net income including noncontrolling interests   580   1,021
Other comprehensive income (loss), net of tax   13   6
Ending balance   27,073   27,073
As Previously Reported | Retained Earnings        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   2,091   2,229
Net income including noncontrolling interests   580   1,021
Ending balance   2,083   2,083
As Previously Reported | Accumulated other comprehensive income (loss)        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   (180)   (173)
Other comprehensive income (loss), net of tax   13   6
Ending balance   (167)   (167)
As Previously Reported | Shareholder's Equity        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   27,457   27,567
Net income including noncontrolling interests   580   1,021
Other comprehensive income (loss), net of tax   13   6
Ending balance   27,073   27,073
Adjustments        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   (337) (390) (303)
Net income including noncontrolling interests   (17)   (55)
Other comprehensive income (loss), net of tax   (2)   2
Ending balance   (356)   (356)
Adjustments | Retained Earnings        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   (342)   (304)
Net income including noncontrolling interests   (17)   (55)
Ending balance   (359)   (359)
Adjustments | Accumulated other comprehensive income (loss)        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   5   1
Other comprehensive income (loss), net of tax   (2)   2
Ending balance   3   3
Adjustments | Shareholder's Equity        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   (337)   (303)
Net income including noncontrolling interests   (17)   (55)
Other comprehensive income (loss), net of tax   (2)   2
Ending balance   (356)   (356)
Virginia Electric and Power Company        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance 25,995 21,829 25,096 [2] 21,613
Net income including noncontrolling interests 589 477 1,120 938
Other comprehensive income (loss), net of tax 0 3 (5) 7
Ending balance 28,922 22,309 28,922 22,309
Virginia Electric and Power Company | Retained Earnings        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance 12,622 11,708 12,136 11,496
Net income including noncontrolling interests 535 477 1,020 938
Ending balance 13,156 12,185 13,156 12,185
Virginia Electric and Power Company | Accumulated other comprehensive income (loss)        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance 23 21 28 17
Other comprehensive income (loss), net of tax 0 3 (5) 7
Ending balance 23 24 23 24
Virginia Electric and Power Company | Shareholder's Equity        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance 22,638 21,829 22,157 21,613
Net income including noncontrolling interests 535 477 1,020 938
Other comprehensive income (loss), net of tax 0 3 (5) 7
Ending balance $ 25,265 22,309 25,265 22,309
Virginia Electric and Power Company | As Previously Reported        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   21,876 25,153 21,657
Net income including noncontrolling interests   479   944
Other comprehensive income (loss), net of tax   4   7
Ending balance   22,359   22,359
Virginia Electric and Power Company | As Previously Reported | Retained Earnings        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   11,757   11,541
Net income including noncontrolling interests   479   944
Ending balance   12,236   12,236
Virginia Electric and Power Company | As Previously Reported | Accumulated other comprehensive income (loss)        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   19   16
Other comprehensive income (loss), net of tax   4   7
Ending balance   23   23
Virginia Electric and Power Company | As Previously Reported | Shareholder's Equity        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   21,876   21,657
Net income including noncontrolling interests   479   944
Other comprehensive income (loss), net of tax   4   7
Ending balance   22,359   22,359
Virginia Electric and Power Company | Adjustments        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   (47) $ (57) (44)
Net income including noncontrolling interests   (2)   (6)
Other comprehensive income (loss), net of tax   (1)   0
Ending balance   (50)   (50)
Virginia Electric and Power Company | Adjustments | Retained Earnings        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   (49)   (45)
Net income including noncontrolling interests   (2)   (6)
Ending balance   (51)   (51)
Virginia Electric and Power Company | Adjustments | Accumulated other comprehensive income (loss)        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   2   1
Other comprehensive income (loss), net of tax   (1)   0
Ending balance   1   1
Virginia Electric and Power Company | Adjustments | Shareholder's Equity        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Beginning balance   (47)   (44)
Net income including noncontrolling interests   (2)   (6)
Other comprehensive income (loss), net of tax   (1)   0
Ending balance   $ (50)   $ (50)
[1] Dominion Energy’s Consolidated Balance Sheet at December 31, 2024 has been derived from the audited Consolidated Balance Sheet at that date.
[2] Virginia Power’s Consolidated Balance Sheet at December 31, 2024 has been derived from the audited Consolidated Balance Sheet at that date.