Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2023

Compensation And Retirement Disclosure [Abstract]

Net Periodic Benefit Cost (Credit)

The service cost component of net periodic benefit (credit) cost is reflected in other operations and maintenance expense in Dominion Energy’s Consolidated Statements of Income. The non-service cost components of net periodic benefit (credit) cost are reflected in other income (expense) in Dominion Energy’s Consolidated Statements of Income. The components of Dominion Energy’s provision for net periodic benefit cost (credit) are as follows:

	Pension Benefits												Other Postretirement Benefits
	Quarter-to-Date						Year-to-Date						Quarter-to-Date						Year-to-Date
Period Ended June 30,	2023			2022			2023			2022			2023			2022			2023			2022
(millions)
Service cost	$	24		$	35		$	48		$	71		$	4		$	5		$	7		$	11
Interest cost		110			84			221			167			16			12			31			23
Expected return on plan assets		(216	)		(223	)		(432	)		(446	)		(38	)		(48	)		(76	)		(96	)
Amortization of prior service    cost (credit)		—			—			—			—			(9	)		(9	)		(18	)		(19	)
Amortization of net actuarial    (gain) loss		—			40			—			80			(2	)		(1	)		(3	)		(1	)
Net periodic benefit    (credit) cost	$	(82	)	$	(64	)	$	(163	)	$	(128	)	$	(29	)	$	(41	)	$	(59	)	$	(82	)