Income Taxes (Income Tax Expense for Continuing Operations Including Noncontrolling Interests) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022
Current:
Federal		$ (235)		$ (385)		$ (76)
State		32		(99)		27
Total current expense (benefit)		(203)		(484)		(49)
Deferred:
Taxes before operating loss carryforwards and investment tax credits		446		758		55
Tax utilization expense of operating loss carryforwards		40		45		35
State		60		277		59
Total deferred expense		546		1,080		149
Investment tax credits		(35)		(28)		(41)
Income tax expense (benefit)		308	[1]	568	[2]	59	[3]
Virginia Electric and Power Company
Current:
Federal		(23)		(116)		17
State		67		6		(17)
Total current expense (benefit)		44		(110)		0
Deferred:
Taxes before operating loss carryforwards and investment tax credits		325		406		215
Tax utilization expense of operating loss carryforwards		0		0		0
State		60		107		108
Total deferred expense		385		513		323
Investment tax credits		(21)		(14)		(29)
Income tax expense (benefit)	[4]	$ 408		$ 389		$ 294

[1] The significant expense categories and amounts in the segment information presented above align with the segment-level information that is regularly provided to Dominion Energy’s CODM.

[2] The significant expense categories and amounts in the segment information presented above align with the segment-level information that is regularly provided to Dominion Energy’s CODM.

[3] The significant expense categories and amounts in the segment information presented above align with the segment-level information that is regularly provided to Dominion Energy’s CODM.

[4] The significant expense categories and amounts in the segment information presented above align with the segment-level information that is regularly provided to Virginia Power’s CODM.