Significant Financing Transactions (Tables)

6 Months Ended

Jun. 30, 2017

Short Term Debt Other Disclosures [Abstract]

At June 30, 2017, Questar Gas' commercial paper and letters of credit outstanding under its joint credit facilities with Dominion Energy, Virginia Power and Dominion Energy Gas, were as follows:

	Facility Limit⁽¹⁾		Outstanding Commercial Paper		Outstanding Letters of Credit
(millions)
Joint revolving credit facility⁽¹⁾	$	500.0	$	135.0	$	—
Joint revolving credit facility⁽¹⁾		500.0		—		—
Total	$	1,000.0	$	135.0	$	—

(1)

A maximum of a combined $1.0 billion of the facilities is available to Questar Gas, assuming adequate capacity is available after giving effect to uses by co-borrowers Dominion Energy, Virginia Power and Dominion Energy Gas. Sub-limits for Questar Gas are set within the facility limit but can be changed at the option of the borrowers multiple times per year. At June 30, 2017, the sub-limit for Questar Gas was an aggregate $250 million. If Questar Gas has liquidity needs in excess of its sub-limit, the sub-limit may be changed or such needs may be satisfied through short-term intercompany borrowings from Dominion Energy. The maturity date for these facilities is April 2020. These credit facilities can be used to support bank borrowings and the issuance of commercial paper, as well as to support up to $1.0 billion (or the sub-limit, whichever is less) of letters of credit.