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Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment, Net [Abstract]

Property, Plant and Equipment

Dominion's nonutility property, plant and equipment is depreciated using the straight-line method over the following estimated useful lives:

Asset	Estimated Useful Lives
Merchant generation-nuclear	44 years
Merchant generation-other	15-36 years
Nonutility gas gathering and processing	3-50 years
General and other	5-59 years

Major classes of property, plant and equipment and their respective balances for the Companies are as follows:

At December 31,	2016			2015
(millions)
Dominion
Utility:
Generation	$	17,147		$	15,656
Transmission	14,315			11,461
Distribution	16,381			13,128
Storage	2,814			2,460
Nuclear fuel	1,537			1,464
Gas gathering and processing	216			799
Oil and gas	1,652			—
General and other	1,450			927
Plant under construction	6,254			5,550
Total utility	61,766			51,445
Nonutility:
Merchant generation-nuclear	1,419			1,339
Merchant generation-other	4,149			2,683
Nuclear fuel	897			938
Gas gathering and processing	619			—
Other-including plant under construction	706			1,371
Total nonutility	7,790			6,331
Total property, plant and equipment	$	69,556		$	57,776
Virginia Power
Utility:
Generation	$	17,147		$	15,656
Transmission	7,871			6,963
Distribution	10,573			10,048
Nuclear fuel	1,537			1,464
General and other	745			709
Plant under construction	2,146			2,793
Total utility	40,019			37,633
Nonutility-other	11			6
Total property, plant and equipment	$	40,030		$	37,639
Dominion Gas
Utility:
Transmission	$	4,231		$	3,804
Distribution	3,019			2,765
Storage	1,627			1,583
Gas gathering and processing	198			797
General and other	184			165
Plant under construction	448			443
Total utility	9,707			9,557
Nonutility:
Gas gathering and processing	$	619		$	—
Other-including plant under construction	149			136
Total nonutility	768			136
Total property, plant and equipment	$	10,475		$	9,693

Share of Jointly-Owned Power Stations

Dominion's and Virginia Power's proportionate share of jointly-owned power stations at December 31, 2016 is as follows:

	Bath County Pumped Storage Station(1)			North Anna Units 1 and 2(1)			Clover Power Station(1)			Millstone Unit 3(2)
(millions, except percentages)
Ownership interest	60		%	88.4		%	50		%	93.5		%
Plant in service	$	1,052		$	2,520		$	586		$	1,190
Accumulated depreciation	(585		)	(1,210		)	(219		)	(349		)
Nuclear fuel	—			718			—			469
Accumulated amortization of nuclear fuel	—			(549		)	—			(366		)
Plant under construction	8			69			4			51

(1) Units jointly owned by Virginia Power.

(2) Unit jointly owned by Dominion.

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- References

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- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.13)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 13
-Subparagraph b
-Article 5

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- Definition

Tabular disclosure of proportionate interests in jointly owned utility plants. Includes the amount of plants in service, the accumulated provision for depreciation (if available), the amount of plants under construction, and the proportionate share. The amounts presented may be further subdivided to show amounts applicable to plant subcategories (for example, production, transmission, distribution). Includes statements that the amounts represent the utility's share in each joint plant and that it must provide its own financing. Information concerning two or more generating plants on the same site may be combined. States that the utility's share of direct expenses of the joint plants is included in the corresponding operating expenses on its income statement (for example, fuel, maintenance of plant, other operating expense). If the share of direct expenses is charged to purchased power, then disclose the amount so charged and the proportionate amounts charged to specific operating expenses on the records maintained for the joint plants.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 360
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 10.C)
-URI http://asc.fasb.org/extlink&oid=6500719&loc=d3e659983-123033

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 10
-Section C

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