Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Net deferred losses on derivative-hedging activities, tax	$ 93	$ 5
Changes in unrealized net gains on investment securities, tax	(4)	(6)
Net derivative (gains) losses-hedging activities, tax	(7)	10
Net realized (gains) losses on investment securities, tax	4	0
Net pension and other postretirement benefit costs, tax	(5)	(14)
Virginia Electric and Power Company
Net deferred losses on derivative-hedging activities, tax	16	2
Changes in unrealized net gains on investment securities, tax	0	(1)
Net realized (gains) losses on investment securities, tax	(1)	0
Dominion Energy Gas Holdings, LLC
Net deferred losses on derivative-hedging activities, tax	32	9
Net derivative (gains) losses-hedging activities, tax	(2)	0
Net pension and other postretirement benefit costs, tax	$ (1)	$ (1)

Amount, before reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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