v3.25.2
Accumulated Other Comprehensive Income (Loss) (Schedule of Changes in AOCI Net of Tax and Reclassifications out of AOCI by Component) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance [1]     $ 26,863  
Total other comprehensive income (loss) $ 5 $ 11 7 $ 8
Ending balance 27,215   27,215  
Virginia Electric and Power Company        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance [2]     22,157  
Total other comprehensive income (loss) 0 3 (5) 7
Ending balance 25,265   25,265  
Total Derivative-Hedging Activities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (179) [3],[4] (202) [3],[4] (171) [5],[6] (216) [5],[6]
Other comprehensive income (loss) before reclassifications: gains (losses) 0 [3],[4] 2 [3],[4] (16) [5],[6] 9 [5],[6]
Income tax expense (benefit) (3) [3],[4] (2) [3],[4] (5) [5],[6] (6) [5],[6]
Total, net of tax 7 [3],[4] 9 [3],[4] 15 [5],[6] 16 [5],[6]
Total other comprehensive income (loss) 7 [3],[4] 11 [3],[4] (1) [5],[6] 25 [5],[6]
Ending balance [3],[4],[6] (172) (191) (172) (191)
Total Derivative-Hedging Activities | Virginia Electric and Power Company        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance 21 [7],[8] 22 [7],[8] 28 [9],[10] 15 [9],[10]
Other comprehensive income (loss) before reclassifications: gains (losses) 2 [7],[8] 2 [7],[8] (5) [9],[10] 9 [9],[10]
Income tax expense (benefit) 0 [7],[8] 0 [7],[8] 0 [9],[10] 0 [9],[10]
Total, net of tax 0 [7],[8] 0 [7],[8] 0 [9],[10] 0 [9],[10]
Total other comprehensive income (loss) 2 [7],[8] 2 [7],[8] (5) [9],[10] 9 [9],[10]
Ending balance [7],[8],[10] 23 24 23 24
Total Derivative-Hedging Activities | Amounts reclassified from AOCI        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Interest and related charges (benefit) 10 [3],[4] 11 [3],[4] 20 [5],[6] 22 [5],[6]
Other income (expense) 0 [3],[4] 0 [3],[4] 0 [5],[6] 0 [5],[6]
Income (loss) before income tax expense 10 [3],[4] 11 [3],[4] 20 [5],[6] 22 [5],[6]
Total Derivative-Hedging Activities | Amounts reclassified from AOCI | Virginia Electric and Power Company        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other income (expense) [9],[10]       0
Income (loss) before income tax expense 0 [7],[8] 0 [7],[8] 0 [9],[10] 0 [9],[10]
Investment Securities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance 3 [11] (15) [11] (10) [12] 1 [12]
Other comprehensive income (loss) before reclassifications: gains (losses) (2) [11] 5 [11] 9 [12] (17) [12]
Income tax expense (benefit) (1) [11] 0 [11] (1) [12] (2) [12]
Total, net of tax 2 [11] 0 [11] 4 [12] 6 [12]
Total other comprehensive income (loss) 0 [11] 5 [11] 13 [12] (11) [12]
Ending balance [11],[12] 3 (10) 3 (10)
Investment Securities | Virginia Electric and Power Company        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance 2 [13] (1) [13] 0 [14] 2 [14]
Other comprehensive income (loss) before reclassifications: gains (losses) (2) [13] 0 [13] 0 [14] (4) [14]
Income tax expense (benefit) 0 [13] 1 [13] 0 [14] 0 [14]
Total, net of tax 0 [13] 1 [13] 0 [14] 2 [14]
Total other comprehensive income (loss) (2) [13] 1 [13] 0 [14] (2) [14]
Ending balance [13],[14] 0 0 0 0
Investment Securities | Amounts reclassified from AOCI        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Interest and related charges (benefit) 0 [11] 0 [11] 0 [12] 0 [12]
Other income (expense) 3 [11] 0 [11] 5 [12] 8 [12]
Income (loss) before income tax expense 3 [11] 0 [11] 5 [12] 8 [12]
Investment Securities | Amounts reclassified from AOCI | Virginia Electric and Power Company        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other income (expense) [14]       2
Income (loss) before income tax expense 0 [13] 0 [13] 0 [14] 2 [14]
Pension and Other Postretirement Benefit Costs        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance 26 [15],[16] 42 [15],[16] 29 [17],[18] 43 [17],[18]
Other comprehensive income (loss) before reclassifications: gains (losses) 0 [15],[16] 0 [15],[16] 0 [17],[18] 0 [17],[18]
Income tax expense (benefit) 1 [15],[16] 0 [15],[16] 1 [17],[18] 3 [17],[18]
Total, net of tax (2) [15],[16] (5) [15],[16] (5) [17],[18] (6) [17],[18]
Total other comprehensive income (loss) (2) [15],[16] (5) [15],[16] (5) [17],[18] (6) [17],[18]
Ending balance [15],[16],[18] 24 37 24 37
Pension and Other Postretirement Benefit Costs | Amounts reclassified from AOCI        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Interest and related charges (benefit) 0 [15],[16] 0 [15],[16] 0 [17],[18] 0 [17],[18]
Other income (expense) (3) [15],[16] (5) [15],[16] (6) [17],[18] (9) [17],[18]
Income (loss) before income tax expense (3) [15],[16] (5) [15],[16] (6) [17],[18] (9) [17],[18]
AOCI        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (150) (175) (152) (172)
Other comprehensive income (loss) before reclassifications: gains (losses) (2) 7 (7) (8)
Income tax expense (benefit) (3) (2) (5) (5)
Total, net of tax 7 4 14 16
Total other comprehensive income (loss) 5 11 7 8
Ending balance (145) (164) (145) (164)
AOCI | Virginia Electric and Power Company        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance 23 21 28 17
Other comprehensive income (loss) before reclassifications: gains (losses) 0 2 (5) 5
Income tax expense (benefit) 0 1 0 0
Total, net of tax 0 1 0 2
Total other comprehensive income (loss) 0 3 (5) 7
Ending balance 23 24 23 24
AOCI | Amounts reclassified from AOCI        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Interest and related charges (benefit) 10 11 20 22
Other income (expense) 0 (5) (1) (1)
Income (loss) before income tax expense 10 6 19 21
AOCI | Amounts reclassified from AOCI | Virginia Electric and Power Company        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other income (expense)       2
Income (loss) before income tax expense $ 0 $ 0 $ 0 $ 2
[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.
[3] Comprised entirely of interest rate derivative hedging activities.
[4] Net of $58 million, $61 million, $64 million and $68 million tax at June 30, 2025, March 31, 2025, June 30, 2024 and March 31, 2024, respectively.
[5] Comprised entirely of interest rate derivative hedging activities.
[6] Net of $58 million, $58 million, $64 million and $73 million tax at June 30, 2025, December 31, 2024, June 30, 2024 and December 31, 2023, respectively.
[7] Comprised entirely of interest rate derivative hedging activities.
[8] Net of $(8) million, $(7) million, $(8) million and $(7) million tax at June 30, 2025, March 31, 2025, June 30, 2024 and March 31, 2024, respectively.
[9] Comprised entirely of interest rate derivative hedging activities.
[10] Net of $(8) million, $(10) million, $(8) million and $(5) million tax at June 30, 2025, December 31, 2024, June 30, 2024 and December 31, 2023, respectively.
[11] Net of $— million, $2 million, $6 million and $11 million tax at June 30, 2025, March 31, 2025, June 30, 2024 and March 31, 2024, respectively.
[12] Net of $— million, $9 million, $6 million and $(1) million tax at June 30, 2025, December 31, 2024, June 30, 2024 and December 31, 2023, respectively.
[13] Net of $1 million, $1 million, $1 million and $3 million tax at June 30, 2025, March 31, 2025, June 30, 2024 and March 31, 2024, respectively.
[14] Net of $1 million tax at each of June 30, 2025, December 31, 2024, June 30, 2024 and December 31, 2023.
[15] Comprised entirely of prior service cost.
[16] Net of $(8) million, $(9) million, $(11) million and $(10) million tax at June 30, 2025, March 31, 2025, June 30, 2024 and March 31, 2024, respectively.
[17] Comprised entirely of prior service cost.
[18] Net of $(8) million, $(9) million, $(11) million and $(14) million tax at June 30, 2025, December 31, 2024, June 30, 2024 and December 31, 2023, respectively.