Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Reconciliation of Total Cash, Restricted Cash and Equivalents

The following table provides a reconciliation of the total cash, restricted cash and equivalents reported within the Companies’ Consolidated Balance Sheets to the corresponding amounts reported within the Companies’ Consolidated Statements of Cash Flows for the nine months ended September 30, 2018 and 2017:

	Cash, Restricted Cash and Equivalents at End of Period				Cash, Restricted Cash and Equivalents at Beginning of Period
	September 30, 2018		September 30, 2017		December 31, 2017		December 31,  2016
(millions)
Dominion Energy
Cash and cash equivalents	$	310	$	227	$	120	$	261
Restricted cash and equivalents(1)		77		74		65		61
Cash, restricted cash and equivalents shown in the    Consolidated Statements of Cash Flows	$	387	$	301	$	185	$	322
Virginia Power
Cash and cash equivalents	$	22	$	16	$	14	$	11
Restricted cash and equivalents(1)		10		—		10		—
Cash, restricted cash and equivalents shown in the    Consolidated Statements of Cash Flows	$	32	$	16	$	24	$	11
Dominion Energy Gas
Cash and cash equivalents	$	4	$	13	$	4	$	23
Restricted cash and equivalents (1)		22		29		26		20
Cash, restricted cash and equivalents shown in the    Consolidated Statements of Cash Flows	$	26	$	42	$	30	$	43

(1) Restricted cash and equivalent balances are presented within other current assets in the Companies’ Consolidated Balance Sheets.