Balance Sheets - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents		$ 2.5	$ 6.7	[1]
Customer receivables (less allowance for doubtful accounts of $2.1 and $1.7)		68.4	171.7	[1]
Other receivables		1.8	2.1	[1]
Affiliated receivables		0.1	1.5	[1]
Inventories at lower of average cost or market:
Gas stored		28.2	52.9	[1]
Materials and supplies		23.3	25.2	[1]
Regulatory assets		5.5	16.6	[1]
Other	[2]	5.6	5.3	[1]
Total current assets		135.4	282.0	[1]
Property, Plant and Equipment
Property, plant and equipment		3,149.5	3,041.7	[1]
Accumulated depreciation and amortization		(770.6)	(745.8)	[1]
Total property, plant and equipment, net		2,378.9	2,295.9	[1]
Deferred Charges and Other Assets
Pension and other postretirement benefit assets	[2]	109.8	107.1	[1]
Other		18.5	12.8	[1]
Total deferred charges and other assets		128.3	119.9	[1]
Total assets		2,642.6	2,697.8	[1]
Current Liabilities
Securities due within one year	[1]		120.0
Short-term debt		67.5	165.0	[1]
Affiliated current borrowings		23.6	75.0	[1]
Accounts payable		28.7	53.8	[1]
Accrued interest, payroll and taxes		24.7	15.6	[1]
Payables to affiliates		54.2	68.3	[1]
Regulatory liabilities		57.6	9.9	[1]
Contract liabilities		11.4	17.3	[1]
Other		33.1	27.2	[1]
Total current liabilities		300.8	552.1	[1]
Long-Term Debt		745.2	595.9	[1]
Deferred Credits and Other Liabilities
Deferred income taxes		261.5	276.1	[1]
Regulatory liabilities		444.0	441.0	[1]
Other	[2]	109.7	107.6	[1]
Total deferred credits and other liabilities		815.2	824.7	[1]
Total liabilities		1,861.2	1,972.7	[1]
Commitments and Contingencies (see Note 11)				[1]
Equity
Common stock - par value $2.50	[3]	23.0	23.0	[1]
Additional paid-in capital		272.5	272.5	[1]
Retained earnings		485.9	429.6	[1]
Total common shareholder's equity		781.4	725.1	[1]
Total liabilities and shareholder's equity		$ 2,642.6	$ 2,697.8	[1]

[1] Questar Gas’ Balance Sheet at December 31, 2017 has been derived from the audited Balance Sheet at that date.

[2] See Note 13 for amounts attributable to related parties.

[3] 50.0 million shares authorized; 9.2 million shares outstanding at June 30, 2018 and December 31, 2017.