Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2017

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

Net Periodic Benefit Cost

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

	Pension Benefits						Other Postretirement Benefits
	2017			2016			2017			2016
(millions)
Three Months Ended September 30,
Service cost	$	35		$	30		$	7		$	7
Interest cost		86			79			15			16
Expected return on plan assets		(160	)		(141	)		(32	)		(28	)
Amortization of prior service credit		—			—			(13	)		(9	)
Amortization of net actuarial loss		40			29			3			2
Settlements		1			—			—			—
Net periodic benefit cost (credit)	$	2		$	(3	)	$	(20	)	$	(12	)
Nine Months Ended September 30,
Service cost	$	104		$	87		$	20		$	23
Interest cost		259			234			45			50
Expected return on plan assets		(480	)		(419	)		(95	)		(87	)
Amortization of prior service cost (credit)		1			1			(38	)		(23	)
Amortization of net actuarial loss		121			84			9			5
Settlements		2			—			—			—
Net periodic benefit cost (credit)	$	7		$	(13	)	$	(59	)	$	(32	)

Dominion Energy Gas Holdings, LLC

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

Net Periodic Benefit Cost

The components of Dominion Energy Gas' provision for net periodic benefit credit for employees represented by collective bargaining units were as follows:

	Pension Benefits						Other Postretirement Benefits
	2017			2016			2017			2016
(millions)
Three Months Ended September 30,
Service cost	$	3		$	3		$	1		$	1
Interest cost		7			7			3			3
Expected return on plan assets		(34	)		(33	)		(7	)		(5	)
Amortization of prior service credit		—			—			(1	)		—
Amortization of net actuarial loss		4			3			1			—
Net periodic benefit credit	$	(20	)	$	(20	)	$	(3	)	$	(1	)
Nine Months Ended September 30,
Service cost	$	11		$	10		$	3		$	4
Interest cost		22			22			9			10
Expected return on plan assets		(105	)		(100	)		(19	)		(17	)
Amortization of prior service credit		—			—			(2	)		—
Amortization of net actuarial loss		12			10			2			1
Net periodic benefit credit	$	(60	)	$	(58	)	$	(7	)	$	(2	)