Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net deferred losses on derivative-hedging activities, tax	$ (4)	$ 27	$ 89	$ 32
Changes in unrealized net gains (losses) on investment securities, tax	(6)	(5)	(10)	(11)
Changes in net unrecognized pension and other postretirement benefit costs, tax	3	(49)	3	(49)
Net derivative (gains) losses-hedging activities, tax	(2)	8	(9)	18
Net realized (gains) losses on investment securities, tax	0	0	4	0
Net pension and other postretirement benefit costs, tax	(8)	3	(13)	(11)
Virginia Electric and Power Company
Net deferred losses on derivative-hedging activities, tax	(1)	4	15	6
Changes in unrealized net gains (losses) on investment securities, tax	(1)	0	(1)	(1)
Net derivative (gains) losses-hedging activities, tax	(1)	0	(1)	0
Net realized (gains) losses on investment securities, tax	2	0	1	0
Dominion Energy Gas Holdings, LLC
Net deferred losses on derivative-hedging activities, tax	(1)	8	31	17
Changes in net unrecognized pension and other postretirement benefit costs, tax	0	(11)	0	(11)
Net derivative (gains) losses-hedging activities, tax	0	0	(2)	0
Net pension and other postretirement benefit costs, tax	$ 0	$ 0	$ (1)	$ (1)