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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Net deferred gains (losses) on derivatives-hedging activities, tax $ (22) $ (6) $ 81
Changes in unrealized net gains (losses) on investment securities, tax 29 7 (14)
Changes in net unrecognized pension and other postretirement benefit costs, tax 76 (54) (2)
Net derivative (gains) losses-hedging activities, tax (15) (15) (75)
Net realized (gains) losses on investment securities, tax (6) 5 6
Net pension and other postretirement benefit costs, tax (27) (29) (13)
Changes in other comprehensive income from equity method investees, tax   1 (1)
Virginia Electric and Power Company      
Net deferred gains (losses) on derivatives-hedging activities, tax (20) (4) 9
Changes in unrealized net gains (losses) on investment securities, tax 4 0 (3)
Net derivative (gains) losses-hedging activities, tax (1) (1) 0
Net realized (gains) losses on investment securities, tax $ 0 $ 1 $ 1