Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Net deferred gains (losses) on derivatives-hedging activities, tax | $ 0 | $ (2) | $ 5 | $ (3) |
| Changes in unrealized net gains (losses) on investment securities, tax | (1) | (4) | (8) | 10 |
| Changes in net unrecognized pension and other postretirement benefit costs, tax | 0 | 0 | 0 | 0 |
| Net derivative (gains) losses-hedging activities, tax | (3) | (2) | (5) | (6) |
| Net realized (gains) losses on investment securities, tax | (1) | 0 | (1) | (2) |
| Net pension and other postretirement benefit costs (credits), tax | (1) | 0 | (1) | (3) |
| Virginia Electric and Power Company | ||||
| Net deferred gains (losses) on derivatives-hedging activities, tax | 0 | 2 | 2 | (3) |
| Changes in unrealized net gains (losses) on investment securities, tax | 0 | (1) | 0 | 1 |
| Net realized (gains) losses on investment securities, tax | $ 0 | $ 1 | $ 0 | $ 0 |