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Accumulated Other Comprehensive Income (Loss) | 3 Months Ended
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Mar. 31, 2024
Equity [Abstract] |
Accumulated Other Comprehensive Income (Loss) | Note 7. Accumulated Other Comprehensive Income (Loss) Dominion Energy The following table presents 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) |  |  | Equity Method Investees(5) |  |  | Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Three Months Ended March 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | (216 | ) |  | $ | — |  |  | $ | (1,290 | ) |  | $ | — |  |  | $ | (1,506 | )
Other comprehensive income (loss) before reclassifications: gains (losses) |  |  | 7 |  |  |  | (26 | ) |  |  | (237 | ) |  |  | — |  |  |  | (256 | )
Amounts reclassified from AOCI: (gains) losses |  |  |  |  |  |  |  |  |  |  |  |  |
Interest and related charges |  |  | 11 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 11 |
Other income (expense) |  |  | — |  |  |  | 8 |  |  |  | 6 |  |  |  | — |  |  |  | 14 |
Total |  |  | 11 |  |  |  | 8 |  |  |  | 6 |  |  |  | — |  |  |  | 25 |
Income tax expense (benefit) |  |  | (4 | ) |  |  | (2 | ) |  |  | (1 | ) |  |  | — |  |  |  | (7 | )
Total, net of tax |  |  | 7 |  |  |  | 6 |  |  |  | 5 |  |  |  | — |  |  |  | 18 |
Net current period other comprehensive income (loss) |  |  | 14 |  |  |  | (20 | ) |  |  | (232 | ) |  |  | — |  |  |  | (238 | )
Ending balance |  | $ | (202 | ) |  | $ | (20 | ) |  | $ | (1,522 | ) |  | $ | — |  |  | $ | (1,744 | )
Three Months Ended March 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | (249 | ) |  | $ | (44 | ) |  | $ | (1,276 | ) |  | $ | (3 | ) |  | $ | (1,572 | )
Other comprehensive income (loss) before reclassifications: gains (losses) |  |  | (9 | ) |  |  | 17 |  |  |  | — |  |  |  | 1 |  |  |  | 9 |
Amounts reclassified from AOCI: (gains) losses |  |  |  |  |  |  |  |  |  |  |  |  |
Interest and related charges |  |  | 11 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 11 |
Other income (expense) |  |  | — |  |  |  | 2 |  |  |  | (15 | ) |  |  | — |  |  |  | (13 | )
Total |  |  | 11 |  |  |  | 2 |  |  |  | (15 | ) |  |  | — |  |  |  | (2 | )
Income tax expense (benefit) |  |  | (3 | ) |  |  | (1 | ) |  |  | 4 |  |  |  | — |  |  |  | — |
Total, net of tax |  |  | 8 |  |  |  | 1 |  |  |  | (11 | ) |  |  | — |  |  |  | (2 | )
Net current period other comprehensive income (loss) |  |  | (1 | ) |  |  | 18 |  |  |  | (11 | ) |  |  | 1 |  |  |  | 7 |
Ending balance |  | $ | (250 | ) |  | $ | (26 | ) |  | $ | (1,287 | ) |  | $ | (2 | ) |  | $ | (1,565 | )
(1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $68 million, $73 million, $83 million and $83 million tax at March 31, 2024, December 31, 2023, March 31, 2023 and December 31, 2022, respectively. (3) Net of $6 million, $(2) million, $6 million and $13 million tax at March 31, 2024, December 31, 2023, March 31, 2023 and December 31, 2022, respectively. (4) Net of $538 million, $456 million, $449 million and $445 million tax at March 31, 2024, December 31, 2023, March 31, 2023 and December 31, 2022, respectively. (5) Net of $— million at March 31, 2024, December 31, 2023 and March 31, 2023 and $1 million at December 31, 2022. Virginia Power The following table presents 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 March 31, 2024 |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 15 |  |  | $ | 1 |  |  | $ | 16 |
Other comprehensive income (loss) before reclassifications: gains (losses) |  |  | 7 |  |  |  | (5 | ) |  |  | 2 |
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) |  |  | 7 |  |  |  | (4 | ) |  |  | 3 |
Ending balance |  | $ | 22 |  |  | $ | (3 | ) |  | $ | 19 |
Three Months Ended March 31, 2023 |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 16 |  |  | $ | (7 | ) |  | $ | 9 |
Other comprehensive income (loss) before reclassifications: gains (losses) |  |  | (9 | ) |  |  | 4 |  |  |  | (5 | )
Net current period other comprehensive income (loss) |  |  | (9 | ) |  |  | 4 |  |  |  | (5 | )
Ending balance |  | $ | 7 |  |  | $ | (3 | ) |  | $ | 4 |
(1) Comprised entirely of interest rate derivative hedging activities. (2) Net of $(7) million, $(5) million, $(2) million and $(5) million tax at March 31, 2024, December 31, 2023, March 31, 2023 and December 31, 2022, respectively. (3) Net of $1 million, $— million, $1 million and $2 million tax at March 31, 2024, December 31, 2023, March 31, 2023 and December 31, 2022, respectively.

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