Equity and fixed income securities and cash equivalents in Dominion Energy’s rabbi trusts and classified as trading totaled $113 million and $111 million at June 30, 2019 and December 31, 2018, respectively.

Dominion Energy holds equity and fixed income securities, insurance contracts and cash equivalents in nuclear decommissioning trust funds to fund future decommissioning costs for its nuclear plants. Dominion Energy’s decommissioning trust funds are summarized below:

	Amortized Cost		Total Unrealized Gains		Total Unrealized Losses				Fair Value
(millions)
June 30, 2019
Equity securities:⁽¹⁾
U.S.	$	1,776	$	2,120	$	(21	)		$	3,875
Fixed income securities:⁽²⁾
Corporate debt instruments		474		27		(1	)			500
Government securities		1,073		41		(2	)			1,112
Common/collective trust funds		63		—		—				63
Insurance contracts		206		—		—				206
Cash equivalents and other⁽³⁾		11		—		—				11
Total	$	3,603	$	2,188	$	(24	)	⁽⁴⁾	$	5,767
December 31, 2018
Equity securities:⁽¹⁾
U.S.	$	1,741	$	1,640	$	(51	)		$	3,330
Fixed income securities:⁽²⁾
Corporate debt instruments		435		5		(9	)			431
Government securities		1,092		17		(12	)			1,097
Common/collective trust funds		76		—		—				76
Cash equivalents and other		4		—		—				4
Total	$	3,348	$	1,662	$	(72	)	⁽⁴⁾	$	4,938

The portion of unrealized gains and losses that relates to equity securities held within Dominion Energy’s nuclear decommissioning trusts is summarized below:

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
(millions)
Net gains recognized during the period	$	156		$	89		$	570		$	24
Less: Net gains recognized during the period on securities sold during the period		(25	)		(16	)		(44	)		(35	)
Unrealized gains (losses) recognized during the period on securities still held at June 30, 2019 and 2018⁽¹⁾	$	131		$	73		$	526		$	(11	)

The fair value of Dominion Energy’s fixed income securities with readily determinable fair values held in nuclear decommissioning trust funds at June 30, 2019 by contractual maturity is as follows:

Presented below is selected information regarding Dominion Energy’s equity and fixed income securities with readily determinable fair values held in nuclear decommissioning trust funds.

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
(millions)
Proceeds from sales	$	376	$	425	$	882	$	844
Realized gains⁽¹⁾		56		36		99		72
Realized losses⁽¹⁾		27		23		50		42

Other-than-temporary impairment losses on investments held in nuclear decommissioning trust funds recognized in earnings for Dominion Energy were immaterial for the three and six months ended June 30, 2019 and 2018.

Virginia Power holds equity and fixed income securities and cash equivalents in nuclear decommissioning trust funds to fund future decommissioning costs for its nuclear plants. Virginia Power’s decommissioning trust funds are summarized below:

	Amortized Cost		Total Unrealized Gains		Total Unrealized Losses				Fair Value
(millions)
June 30, 2019
Equity securities:⁽¹⁾
U.S.	$	888	$	981	$	(11	)		$	1,858
Fixed income securities:⁽²⁾
Corporate debt instruments		244		13		—				257
Government securities		500		18		(1	)			517
Common/collective trust funds		47		—		—				47
Cash equivalents and other⁽³⁾		3		—		—				3
Total	$	1,682	$	1,012	$	(12	)	⁽⁴⁾	$	2,682
December 31, 2018
Equity securities:⁽¹⁾
U.S.	$	858	$	751	$	(24	)		$	1,585
Fixed income securities:⁽²⁾
Corporate debt instruments		224		2		(5	)			221
Government securities		504		7		(5	)			506
Common/collective trust funds		51		—		—				51
Cash equivalents and other⁽³⁾		6		—		—				6
Total	$	1,643	$	760	$	(34	)	⁽⁴⁾	$	2,369

The portion of unrealized gains and losses that relates to equity securities held within Virginia Power’s nuclear decommissioning trusts is summarized below:

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
(millions)
Net gains recognized during the period	$	70		$	44		$	256		$	12
Less: Net gains recognized during the period on securities sold during the period		(7	)		(8	)		(8	)		(23	)
Unrealized gains (losses) recognized during the period on securities still held at June 30, 2019 and 2018⁽¹⁾	$	63		$	36		$	248		$	(11	)

The fair value of Virginia Power’s fixed income securities with readily determinable fair values held in nuclear decommissioning trust funds at June 30, 2019 by contractual maturity is as follows:

Presented below is selected information regarding Virginia Power’s equity and fixed income securities with readily determinable fair values held in nuclear decommissioning trust funds.

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
(millions)
Proceeds from sales	$	194	$	196	$	447	$	414
Realized gains⁽¹⁾		15		15		25		33
Realized losses⁽¹⁾		3		7		12		12

Other-than-temporary impairment losses on investments held in nuclear decommissioning trust funds recognized in earnings for Virginia Power were immaterial for the three and six months ended June 30, 2019 and 2018.

In September 2014, Dominion Energy, along with Duke and Southern Company Gas, announced the formation of Atlantic Coast Pipeline. The Atlantic Coast Pipeline partnership agreement includes provisions to allow Dominion Energy an option to purchase additional ownership interest in Atlantic Coast Pipeline to maintain a leading ownership percentage. As of June 30, 2019, the members hold the following membership interests: Dominion Energy, 48%; Duke, 47%; and Southern Company Gas, 5%.

Atlantic Coast Pipeline is focused on constructing an approximately 600-mile natural gas pipeline running from West Virginia through Virginia to North Carolina. Subsidiaries and affiliates of all three members plan to be customers of the pipeline under 20-year contracts. Atlantic Coast Pipeline is considered an equity method investment as Dominion Energy has the ability to exercise significant influence, but not control, over the investee. See Note 15 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2018 for more information.

Dominion Energy recorded contributions of $33 million and $81 million during the three months ended June 30, 2019 and 2018, respectively, and $128 million and $159 million during the six months ended June 30, 2019 and 2018, respectively, to Atlantic Coast Pipeline. At June 30, 2019, Dominion Energy had $11 million of contributions payable to Atlantic Coast Pipeline included within other current liabilities in the Consolidated Balance Sheets.

DETI provides services to Atlantic Coast Pipeline which totaled $26 million and $60 million for the three months ended June 30, 2019 and 2018, respectively, and $57 million and $106 million for the six months ended June 30, 2019 and 2018, respectively, included in operating revenue in Dominion Energy and Dominion Energy Gas’ Consolidated Statements of Income. Amounts receivable related to these services were $10 million and $13 million at June 30, 2019 and December 31, 2018, respectively, composed entirely of accrued unbilled revenue, included in other receivables in Dominion Energy and Dominion Energy Gas’ Consolidated Balance Sheets.

In October 2017, Dominion Energy entered into a guarantee agreement to support a portion of Atlantic Coast Pipeline’s obligation under its credit facility. See Note 18 for more information.

During the third and fourth quarters of 2018, a FERC stop work order together with delays in obtaining permits necessary for construction along with construction delays due to judicial actions impacted the cost and schedule for the project. As a result, project cost estimates have increased from between $6.0 billion to $6.5 billion to between $7.0 billion to $7.5 billion, excluding financing costs. Atlantic Coast Pipeline expects to achieve a late 2020 in-service date for at least key segments of the project, while the remainder may extend into early 2021. Alternatively, if it takes longer to resolve the judicial issues, such as through resolution of the appeal to the Supreme Court of the U.S. filed in June 2019, full in-service could extend to the end of 2021 with total project cost estimated to increase an additional $250 million, resulting in total project cost estimates of $7.25 billion to $7.75 billion, excluding financing costs. Atlantic Coast Pipeline is also evaluating possible legislative and administrative remedies. Project construction activities, schedules and costs are subject to uncertainty due to permitting and/or work delays (including due to judicial or regulatory action), abnormal weather and other conditions that could result in cost or schedule modifications in the future, a suspension of AFUDC for Atlantic Coast Pipeline and/or impairment charges potentially material to Dominion Energy’s cash flows, financial position and/or results of operations.

In the first quarter of 2019, Dominion Energy received $151 million of additional consideration, including applicable interest, in connection with the sale of Dominion Energy’s 50% limited partnership interest in Blue Racer in December 2018, as discussed in Note 9 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2018.

Dominion Energy Gas’ equity earnings totaled $10 million and $14 million for the six months ended June 30, 2019 and 2018, respectively. Dominion Energy Gas received distributions of $13 million and $14 million for the six months ended June 30, 2019 and 2018, respectively. At June 30, 2019 and December 31, 2018, the carrying amount of Dominion Energy Gas’ investment of $88 million and $91 million, respectively, exceeded its share of underlying equity in net assets by $8 million. The difference reflects equity method goodwill and is not being amortized.