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Investments
3 Months Ended
Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]  
Investments
Investments
Dominion
Equity and Debt Securities
Rabbi Trust Securities
Marketable equity and debt securities and cash equivalents held in Dominion’s rabbi trusts and classified as trading totaled $108 million and $104 million at March 31, 2017 and December 31, 2016, respectively.

Decommissioning Trust Securities
Dominion holds marketable equity and debt securities (classified as available-for-sale), cash equivalents and cost method investments in nuclear decommissioning trust funds to fund future decommissioning costs for its nuclear plants. Dominion’s decommissioning trust funds are summarized below:
 
Amortized
Cost
Total  Unrealized Gains(1)
Total  Unrealized
Losses(1)
 
Fair Value
(millions)
 
 
 
 
 
At March 31, 2017
 
 
 
 
 
Marketable equity securities:
 
 
 
 
 
U.S.
$
1,543

$
1,478

$

 
$
3,021

Fixed income:
 
 
 
 
 
Corporate debt instruments
488

13

(3
)
 
498

Government securities
977

24

(6
)
 
995

Common/collective trust funds
66



 
66

Cost method investments
69



 
69

Cash equivalents and other(2)
6



 
6

Total
$
3,149

$
1,515

$
(9
)
(3) 
$
4,655

At December 31, 2016
 
 
 
 
 
Marketable equity securities:
 
 
 
 
 
U.S.
$
1,449

$
1,408

$

 
$
2,857

Fixed income:
 
 
 
 
 
Corporate debt instruments
478

13

(4
)
 
487

Government securities
978

22

(8
)
 
992

Common/collective trust funds
67



 
67

Cost method investments
69



 
69

Cash equivalents and other(2)
12



 
12

Total
$
3,053

$
1,443

$
(12
)
(3) 
$
4,484

(1)
Included in AOCI and the nuclear decommissioning trust regulatory liability.
(2)
Includes net pending sales of securities of $2 million and $9 million at March 31, 2017 and December 31, 2016, respectively.
(3)
The fair value of securities in an unrealized loss position was $461 million and $576 million at March 31, 2017 and December 31, 2016, respectively.

The fair value of Dominion’s marketable debt securities held in nuclear decommissioning trust funds at March 31, 2017 by contractual maturity is as follows:
 
Amount
(millions)
 
Due in one year or less
$
164

Due after one year through five years
434

Due after five years through ten years
385

Due after ten years
576

Total
$
1,559



Presented below is selected information regarding Dominion’s marketable equity and debt securities held in nuclear decommissioning trust funds.
 
Three Months Ended March 31,
 
2017
2016
(millions)
 
 
Proceeds from sales
$
756

$
368

Realized gains(1)
94

25

Realized losses(1)
20

19

(1)
Includes realized gains and losses recorded to the nuclear decommissioning trust regulatory liability.

Other-than-temporary impairment losses on investments held in nuclear decommissioning trust funds for Dominion were not material for the three months ended March 31, 2017 and 2016.

Virginia Power
Virginia Power holds marketable equity and debt securities (classified as available-for-sale), cash equivalents and cost method investments 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
(1)
Total  Unrealized
Losses
(1)
 
Fair Value
(millions)
 
 
 
 
 
At March 31, 2017
 
 
 
 
 
Marketable equity securities:
 
 
 
 
 
U.S.
$
720

$
654

$

 
$
1,374

Fixed income:
 
 
 
 
 
Corporate debt instruments
278

6

(2
)
 
282

Government securities
418

11

(2
)
 
427

Common/collective trust funds
30



 
30

Cost method investments
69



 
69

Cash equivalents and other(2)
4



 
4

Total
$
1,519

$
671

$
(4
)
(3) 
$
2,186

At December 31, 2016
 
 
 
 
 
Marketable equity securities:
 
 
 
 
 
U.S.
$
677

$
624

$

 
$
1,301

Fixed income:
 
 
 
 
 
Corporate debt instruments
274

6

(4
)
 
276

Government securities
420

9

(2
)
 
427

Common/collective trust funds
26



 
26

Cost method investments
69



 
69

Cash equivalents and other(2)
7



 
7

Total
$
1,473

$
639

$
(6
)
(3) 
$
2,106

(1)
Included in AOCI and the nuclear decommissioning trust regulatory liability.
(2)
Includes pending sales of securities of $4 million and $7 million at March 31, 2017 and December 31, 2016, respectively.
(3)
The fair value of securities in an unrealized loss position was $214 million and $287 million at March 31, 2017 and December 31, 2016, respectively.

The fair value of Virginia Power’s marketable debt securities held in nuclear decommissioning trust funds at March 31, 2017 by contractual maturity is as follows:
 
Amount
(millions)
 
Due in one year or less
$
60

Due after one year through five years
188

Due after five years through ten years
205

Due after ten years
286

Total
$
739



Presented below is selected information regarding Virginia Power’s marketable equity and debt securities held in nuclear decommissioning trust funds.
 
Three Months Ended March 31,
 
2017
2016
(millions)
 
 
Proceeds from sales
$
330

$
193

Realized gains(1)
45

12

Realized losses(1)
10

10

(1)
Includes realized gains and losses recorded to the nuclear decommissioning trust regulatory liability.

Other-than-temporary impairment losses on investments held in nuclear decommissioning trust funds for Virginia Power were not material for the three months ended March 31, 2017 and 2016.

Equity Method Investments
Dominion
Atlantic Coast Pipeline    
In the first quarter of 2017, Dominion contributed $117 million to Atlantic Coast Pipeline.

Dominion Gas
Iroquois
Dominion Gas' equity earnings totaled $7 million and $6 million for the three months ended March 31, 2017 and 2016, respectively. Dominion Gas received distributions from this investment of $6 million for both the three months ended March 31, 2017 and 2016. At March 31, 2017 and December 31, 2016, the carrying amount of Dominion Gas' investment of $99 million and $98 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.