Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2018

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Net Periodic Benefit Cost (Credit)

The components of Dominion Energy’s provision for net periodic benefit cost (credit) were as follows:

	Pension Benefits						Other Postretirement Benefits
	2018			2017			2018			2017
(millions)
Three Months Ended September 30,
Service cost	$	39		$	35		$	7		$	7
Interest cost		85			86			14			15
Expected return on plan assets		(165	)		(160	)		(36	)		(32	)
Amortization of prior service cost (credit)		—			—			(13	)		(13	)
Amortization of net actuarial loss		48			40			3			3
Settlements		—			1			—			—
Net periodic benefit cost (credit)	$	7		$	2		$	(25	)	$	(20	)
Nine Months Ended September 30,
Service cost	$	118		$	104		$	20		$	20
Interest cost		253			259			42			45
Expected return on plan assets		(498	)		(480	)		(107	)		(95	)
Amortization of prior service cost (credit)		1			1			(39	)		(38	)
Amortization of net actuarial loss		145			121			8			9
Settlements		—			2			—			—
Net periodic benefit cost (credit)	$	19		$	7		$	(76	)	$	(59	)

Dominion Energy Gas Holdings, LLC

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Net Periodic Benefit Cost (Credit)

The components of Dominion Energy Gas’ provision for net periodic benefit cost (credit) for employees represented by collective bargaining units were as follows

	Pension Benefits						Other Postretirement Benefits
	2018			2017			2018			2017
(millions)
Three Months Ended September 30,
Service cost	$	4		$	3		$	1		$	1
Interest cost		7			7			3			3
Expected return on plan assets		(36	)		(34	)		(7	)		(7	)
Amortization of prior service credit		—			—			(1	)		(1	)
Amortization of net actuarial loss		4			4			—			1
Net periodic benefit credit	$	(21	)	$	(20	)	$	(4	)	$	(3	)
Nine Months Ended September 30,
Service cost	$	13		$	11		$	3		$	3
Interest cost		21			22			8			9
Expected return on plan assets		(111	)		(105	)		(21	)		(19	)
Amortization of prior service credit		—			—			(3	)		(2	)
Amortization of net actuarial loss		14			12			2			2
Net periodic benefit credit	$	(63	)	$	(60	)	$	(11	)	$	(7	)