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Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Net deferred losses on derivative-hedging activities, tax $ (4) $ 37 $ 85 $ 69
Changes in unrealized net gains (losses) on investment securities, tax (2) (2) (12) (13)
Changes in net unrecognized pension and other postretirement benefit costs, tax 91 4 94 (45)
Net derivative (gains) losses-hedging activities, tax (63) 1 (72) 19
Net realized (gains) losses on investment securities, tax 2 1 6 1
Net pension and other postretirement benefit costs, tax (8) (6) (21) (17)
Changes in other comprehensive income from equity method investees, tax (1) 0 (1) 0
Virginia Electric and Power Company        
Net deferred losses on derivative-hedging activities, tax (1) 5 14 11
Changes in unrealized net gains (losses) on investment securities, tax (1) (1) (2) (2)
Net derivative (gains) losses-hedging activities, tax 0 0 (1) 0
Net realized (gains) losses on investment securities, tax $ 0 $ 1 $ 1 $ 1