CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 5.7	$ 20.2
Accounts receivable and unbilled revenues, net of reserves of $39.5 and $40.9, respectively	401.8	472.3
Accounts receivable from related parties	55.5	112.4
Materials, supplies, and inventories	237.0	241.4
Prepaid Taxes	85.4	138.4
Other	26.6	31.6
Current assets	812.0	1,016.3
Long-term assets
Property, plant, and equipment, net of accumulated depreciation and amortization of $4,521.3 and $4,505.5, respectively	9,443.7	9,528.9
Regulatory assets	3,134.2	2,902.2
Other	104.8	90.9
Long-term assets	12,682.7	12,522.0
Total assets	13,494.7	13,538.3
Current liabilities
Short-term debt	37.0	134.9
Current portion of long-term debt	250.0	250.0
Current portion of finance and capital lease obligations	55.8	49.9
Accounts payable	228.8	248.9
Accounts payable to related parties	143.6	226.0
Other	168.8	167.2
Current liabilities	884.0	1,076.9
Long-term liabilities
Long-term debt	2,460.9	2,459.6
Finance and capital lease obligations	2,794.9	2,807.2
Deferred income taxes	1,338.1	1,298.3
Regulatory liabilities	2,005.5	2,002.3
Pension and OPEB obligations	103.6	118.5
Other	288.2	284.3
Long-term liabilities	8,991.2	8,970.2
Commitments and contingencies (Note 16)
Common shareholder's equity
Common stock – $10 par value; 65,000,000 shares authorized; 33,289,327 shares outstanding	332.9	332.9
Additional paid in capital	929.4	831.3
Retained earnings	2,326.8	2,296.6
Common shareholder's equity	3,589.1	3,460.8
Preferred stock	30.4	30.4
Total liabilities and equity	$ 13,494.7	$ 13,538.3