CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 1.7	$ 2.2
Accounts receivable, net	48.9	75.1
Accrued unbilled revenues	45.9	56.2
Other Receivables	7.0	6.8
Inventories	18.0	17.1
Regulatory assets	59.5	22.6
Prepaid taxes	18.9	30.2
Prepayments and other	4.6	3.3
Total current assets	204.5	213.5
Property, Plant and Equipment, Net [Abstract]
Property, plant and equipment, net	2,304.3	2,241.6
Other assets
Regulatory assets	238.5	285.5
Other investments	2.8	2.7
Other	0.2	0.2
Total other assets	241.5	288.4
Total assets	2,750.3	2,743.5
Current liabilities
Short-term debt	68.0	51.0
Notes payable to affiliates	0.0	0.6
Accounts payable	45.7	56.8
Accounts payable to affiliates	16.2	20.0
Dividends payable to parent	11.8	17.4
Regulatory liabilities	61.7	20.9
Taxes Accrued	6.2	3.0
Environmental liabilities	6.3	10.9
Accrued interest	7.7	8.8
Other	15.0	14.8
Total current liabilities	238.6	204.2
Deferred credits and other liabilities
Deferred income taxes	283.9	280.7
Deferred investment tax credits	6.6	7.0
Regulatory liabilities	375.8	400.1
Environmental liabilities	16.4	18.0
Customer advances	19.3	16.8
Pension and employee benefit obligations	37.8	44.5
Other	23.3	22.3
Total deferred credits and other liabilities	763.1	789.4
Capitalization
Long-term debt	807.9	807.5
Common stock — 1,000,000 shares authorized of $100 par value; 933,000 shares outstanding at Sept. 30, 2019 and Dec. 31, 2018, respectively	93.3	93.3
Additional paid in capital	513.6	510.1
Retained earnings	333.8	339.0
Total common stockholder’s equity	940.7	942.4
Total liabilities and equity	$ 2,750.3	$ 2,743.5