Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 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 March 31,
Service cost	$	39		$	35		$	7		$	7
Interest cost		84			86			14			16
Expected return on plan assets		(165	)		(159	)		(36	)		(32	)
Amortization of prior service credit		—			—			(13	)		(12	)
Amortization of net actuarial loss		48			40			3			3
Settlements		—			1			—			—
Net periodic benefit cost (credit)(1)	$	6		$	3		$	(25	)	$	(18	)

(1) The components of net periodic benefit cost (credit) other than the service cost component are included in other income in the Consolidated Statements of Income.

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 March 31,
Service cost	$	4		$	4		$	1		$	1
Interest cost		7			7			3			3
Expected return on plan assets		(37	)		(35	)		(8	)		(6	)
Amortization of prior service credit		—			—			(1	)		—
Amortization of net actuarial loss		5			4			1			1
Net periodic benefit credit(1)	$	(21	)	$	(20	)	$	(4	)	$	(1	)

(1) The components of net periodic benefit credit other than the service cost component are included in other income in the Consolidated Statements of Income.