Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Schedule of Checks Outstanding but Not Yet Presented for Payment

The following table illustrates the checks outstanding but not yet presented for payment and recorded in accounts payable for the Companies:


Year Ended December 31,	2017		2016
(millions)
Dominion Energy	$	30	$	24
Virginia Power		17		11
Dominion Energy Gas		7		9

Amount of Restricted Cash Held at each Company

The Companies hold restricted cash and cash equivalent balances that primarily consist of amounts held for customer deposits, future debt payments on Dominion Solar Projects III, Inc.’s term loan agreement and a distribution reserve at Cove Point. The amount of restricted cash held at each company is presented in the table below. These balances are presented in Other Current Assets and Other Investments in the Consolidated Balance Sheets.


Year Ended December 31,	2017		2016
(millions)
Dominion Energy	$	65	$	61
Virginia Power		10		—
Dominion Energy Gas		26		20

Schedule of Depreciation Rates

The Companies’ average composite depreciation rates on utility property, plant and equipment are as follows:


Year Ended December 31,	2017		2016		2015
(percent)
Dominion Energy
Generation		2.94		2.83		2.78
Transmission		2.55		2.47		2.42
Distribution		3.00		3.02		3.11
Storage		2.48		2.29		2.42
Gas gathering and processing		2.21		2.66		3.19
General and other		4.89		4.12		3.67

Virginia Power
Generation		2.94		2.83		2.78
Transmission		2.54		2.36		2.33
Distribution		3.32		3.32		3.33
General and other		4.68		3.49		3.40

Dominion Energy Gas
Transmission		2.40		2.43		2.46
Distribution		2.42		2.55		2.45
Storage		2.45		2.19		2.44
Gas gathering and processing		2.42		2.58		3.20
General and other		4.96		4.54		4.72

Property, Plant and Equipment

Dominion Energy’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		15-40 years
Nonutility gas gathering and processing		3-50 years
General and other		5-59 years