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Accumulated Other Comprehensive Income (Loss) | 9 Months Ended
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Sep. 30, 2025
Equity [Abstract] |
Accumulated Other Comprehensive Income (Loss) | Note 7. Accumulated Other Comprehensive Income (Loss) Dominion Energy The following tables present Dominion Energy’s changes in AOCI (net of tax) and reclassifications out of AOCI by component:
|  | Total Derivative-Hedging Activities(1)(2) |  |  | Investment Securities(3) |  |  | Pension and other postretirement benefit costs(4)(5) |  |  | Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |
Three Months Ended September 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | (172 | ) |  | $ | 3 |  |  | $ | 24 |  |  | $ | (145 | )
Other comprehensive income (loss) before reclassifications: gains (losses) |  |  | (3 | ) |  |  | 6 |  |  |  | — |  |  |  | 3 |
Amounts reclassified from AOCI: (gains) losses |  |  |  |  |  |  |  |  |  |
Interest and related charges |  |  | 10 |  |  |  | — |  |  |  | — |  |  |  | 10 |
Other income (expense) |  |  | — |  |  |  | (1 | ) |  |  | (3 | ) |  |  | (4 | )
Total |  |  | 10 |  |  |  | (1 | ) |  |  | (3 | ) |  |  | 6 |
Income tax expense (benefit) |  |  | (3 | ) |  |  | — |  |  |  | — |  |  |  | (3 | )
Total, net of tax |  |  | 7 |  |  |  | (1 | ) |  |  | (3 | ) |  |  | 3 |
Net current period other comprehensive income (loss) |  |  | 4 |  |  |  | 5 |  |  |  | (3 | ) |  |  | 6 |
Ending balance |  | $ | (168 | ) |  | $ | 8 |  |  | $ | 21 |  |  | $ | (139 | )
Three Months Ended September 30, 2024 |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | (191 | ) |  | $ | (10 | ) |  | $ | 37 |  |  | $ | (164 | )
Other comprehensive income (loss) before reclassifications: gains (losses) |  |  | (7 | ) |  |  | 27 |  |  |  | — |  |  |  | 20 |
Amounts reclassified from AOCI: (gains) losses |  |  |  |  |  |  |  |  |  |
Interest and related charges |  |  | 11 |  |  |  | — |  |  |  | — |  |  |  | 11 |
Other income (expense) |  |  | — |  |  |  | (2 | ) |  |  | (4 | ) |  |  | (6 | )
Total |  |  | 11 |  |  |  | (2 | ) |  |  | (4 | ) |  |  | 5 |
Income tax expense (benefit) |  |  | (3 | ) |  |  | 1 |  |  |  | 1 |  |  |  | (1 | )
Total, net of tax |  |  | 8 |  |  |  | (1 | ) |  |  | (3 | ) |  |  | 4 |
Net current period other comprehensive income (loss) |  |  | 1 |  |  |  | 26 |  |  |  | (3 | ) |  |  | 24 |
Ending balance |  | $ | (190 | ) |  | $ | 16 |  |  | $ | 34 |  |  | $ | (140 | )
(1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $57 million, $58 million, $64 million and $64 million tax at September 30, 2025, June 30, 2025, September 30, 2024 and June 30, 2024, respectively. (3) Net of $(5) million, $— million, $(8) million and $6 million tax at September 30, 2025, June 30, 2025, September 30, 2024 and June 30, 2024, respectively. (4) Comprised entirely of prior service cost. (5) Net of $(7) million, $(8) million, $(10) million and $(11) million tax at September 30, 2025, June 30, 2025, September 30, 2024 and June 30, 2024, respectively.
|  | Total Derivative-Hedging Activities(1)(2) |  |  | Investment Securities(3) |  |  | Pension and other postretirement benefit costs(4)(5) |  |  | Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |
Nine Months Ended September 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | (171 | ) |  | $ | (10 | ) |  | $ | 29 |  |  | $ | (152 | )
Other comprehensive income (loss) before reclassifications: gains (losses) |  |  | (19 | ) |  |  | 15 |  |  |  | — |  |  |  | (4 | )
Amounts reclassified from AOCI: (gains) losses |  |  |  |  |  |  |  |  |  |
Interest and related charges |  |  | 30 |  |  |  | — |  |  |  | — |  |  |  | 30 |
Other income (expense) |  |  | — |  |  |  | 4 |  |  |  | (9 | ) |  |  | (5 | )
Total |  |  | 30 |  |  |  | 4 |  |  |  | (9 | ) |  |  | 25 |
Income tax expense (benefit) |  |  | (8 | ) |  |  | (1 | ) |  |  | 1 |  |  |  | (8 | )
Total, net of tax |  |  | 22 |  |  |  | 3 |  |  |  | (8 | ) |  |  | 17 |
Net current period other comprehensive income (loss) |  |  | 3 |  |  |  | 18 |  |  |  | (8 | ) |  |  | 13 |
Ending balance |  | $ | (168 | ) |  | $ | 8 |  |  | $ | 21 |  |  | $ | (139 | )
Nine Months Ended September 30, 2024 |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | (216 | ) |  | $ | 1 |  |  | $ | 43 |  |  | $ | (172 | )
Other comprehensive income (loss) before reclassifications: gains (losses) |  |  | 2 |  |  |  | 10 |  |  |  | — |  |  |  | 12 |
Amounts reclassified from AOCI: (gains) losses |  |  |  |  |  |  |  |  |  |
Interest and related charges |  |  | 33 |  |  |  | — |  |  |  | — |  |  |  | 33 |
Other income (expense) |  |  | — |  |  |  | 6 |  |  |  | (13 | ) |  |  | (7 | )
Total |  |  | 33 |  |  |  | 6 |  |  |  | (13 | ) |  |  | 26 |
Income tax expense (benefit) |  |  | (9 | ) |  |  | (1 | ) |  |  | 4 |  |  |  | (6 | )
Total, net of tax |  |  | 24 |  |  |  | 5 |  |  |  | (9 | ) |  |  | 20 |
Net current period other comprehensive income (loss) |  |  | 26 |  |  |  | 15 |  |  |  | (9 | ) |  |  | 32 |
Ending balance |  | $ | (190 | ) |  | $ | 16 |  |  | $ | 34 |  |  | $ | (140 | )
(1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $57 million, $58 million, $64 million and $73 million tax at September 30, 2025, December 31, 2024, September 30, 2024 and December 31, 2023, respectively. (3) Net of $(5) million, $9 million, $(8) million and $(1) million tax at September 30, 2025, December 31, 2024, September 30, 2024 and December 31, 2023, respectively. (4) Comprised entirely of prior service cost. (5) Net of $(7) million, $(9) million, $(10) million and $(14) million tax at September 30, 2025, December 31, 2024, September 30, 2024 and December 31, 2023, respectively. Virginia Power The following tables present Virginia Power’s changes in AOCI (net of tax) and reclassifications out of AOCI by component:
|  | Total Derivative-Hedging Activities(1)(2) |  |  | Investment Securities(3) |  |  | Total |
(millions) |  |  |  |  |  |  |  |  |
Three Months Ended September 30, 2025 |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 23 |  |  | $ | — |  |  | $ | 23 |
Other comprehensive income (loss) before reclassifications: gains (losses) |  |  | (2 | ) |  |  | 1 |  |  |  | (1 | )
Amounts reclassified from AOCI: (gains) losses |  |  |  |  |  |  |  |  |
Total |  |  | — |  |  |  | — |  |  |  | — |
Income tax expense (benefit) |  |  | — |  |  |  | — |  |  |  | — |
Total, net of tax |  |  | — |  |  |  | — |  |  |  | — |
Net current period other comprehensive income (loss) |  |  | (2 | ) |  |  | 1 |  |  |  | (1 | )
Ending balance |  | $ | 21 |  |  | $ | 1 |  |  | $ | 22 |
Three Months Ended September 30, 2024 |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 24 |  |  | $ | — |  |  | $ | 24 |
Other comprehensive income (loss) before reclassifications: gains (losses) |  |  | (7 | ) |  |  | 5 |  |  |  | (2 | )
Amounts reclassified from AOCI: (gains) losses |  |  |  |  |  |  |
Total |  |  | — |  |  |  | — |  |  |  | — |
Income tax expense (benefit) |  |  | — |  |  |  | (1 | ) |  |  | (1 | )
Total, net of tax |  |  | — |  |  |  | (1 | ) |  |  | (1 | )
Net current period other comprehensive income (loss) |  |  | (7 | ) |  |  | 4 |  |  |  | (3 | )
Ending balance |  | $ | 17 |  |  | $ | 4 |  |  | $ | 21 |
(1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $(7) million, $(8) million, $(6) million and $(8) million tax at September 30, 2025, June 30, 2025, September 30, 2024 and June 30, 2024, respectively. (3) Net of $— million, $1 million, $(2) million and $1 million tax at September 30, 2025, June 30, 2025, September 30, 2024 and June 30, 2024, respectively.
|  | Total Derivative-Hedging Activities(1)(2) |  |  | Investment Securities(3) |  |  | Total |
(millions) |  |  |  |  |  |  |  |  |
Nine Months Ended September 30, 2025 |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 28 |  |  | $ | — |  |  | $ | 28 |
Other comprehensive income (loss) before reclassifications: gains (losses) |  |  | (7 | ) |  |  | 1 |  |  |  | (6 | )
Amounts reclassified from AOCI: (gains) losses |  |  |  |  |  |  |  |  |
Total |  |  | — |  |  |  | — |  |  |  | — |
Income tax expense (benefit) |  |  | — |  |  |  | — |  |  |  | — |
Total, net of tax |  |  | — |  |  |  | — |  |  |  | — |
Net current period other comprehensive income (loss) |  |  | (7 | ) |  |  | 1 |  |  |  | (6 | )
Ending balance |  | $ | 21 |  |  | $ | 1 |  |  | $ | 22 |
Nine Months Ended September 30, 2024 |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 15 |  |  | $ | 2 |  |  | $ | 17 |
Other comprehensive income (loss) before reclassifications: gains (losses) |  |  | 2 |  |  |  | 1 |  |  |  | 3 |
Amounts reclassified from AOCI: (gains) losses |  |  |  |  |  |  |
Other income (expense) |  |  | — |  |  |  | 2 |  |  |  | 2 |
Total |  |  | — |  |  |  | 2 |  |  |  | 2 |
Income tax expense (benefit) |  |  | — |  |  |  | (1 | ) |  |  | (1 | )
Total, net of tax |  |  | — |  |  |  | 1 |  |  |  | 1 |
Net current period other comprehensive income (loss) |  |  | 2 |  |  |  | 2 |  |  |  | 4 |
Ending balance |  | $ | 17 |  |  | $ | 4 |  |  | $ | 21 |
(1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $(7) million, $(10) million, $(6) million and $(5) million tax at September 30, 2025, December 31, 2024, September 30, 2024 and December 31, 2023, respectively. (3) Net of $— million, $1 million, $(2) million and $1 million tax at September 30, 2025, December 31, 2024, September 30, 2024 and December 31, 2023, respectively.

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