CONDENSED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 2.0	$ 2.3
Accounts receivable and unbilled revenues, net of reserves of $14.7 and $4.2, respectively	180.9	210.0
Accounts receivable from related parties	19.2	38.7
Materials, supplies, and inventories	105.7	106.4
Prepaid taxes	37.3	63.4
Other	8.5	11.2
Current assets	353.6	432.0
Long-term assets
Property, plant, and equipment, net of accumulated depreciation and amortization of $1,755.0 and $1,672.1, respectively	4,794.0	4,544.5
Regulatory assets	424.6	437.9
Goodwill	36.4	36.4
Pension and OPEB assets	165.6	148.3
Other	38.0	42.5
Long-term assets	5,458.6	5,209.6
Total assets	5,812.2	5,641.6
Current liabilities
Short-term debt	16.0	91.5
Accounts payable	171.5	176.9
Accounts payable to related parties	40.8	68.5
Accrued payroll and benefits	23.2	26.5
Accrued interest	21.6	10.6
Customer credit balances	15.5	17.3
Other	22.1	27.8
Current liabilities	310.7	419.1
Long-term liabilities
Long-term debt	1,644.2	1,642.8
Deferred income taxes	693.9	654.6
Deferred investment tax credits	36.7	6.1
Regulatory liabilities	761.5	782.5
Environmental remediation liabilities	83.8	83.8
Pension and OPEB obligations	18.1	18.6
Other	96.1	94.3
Long-term liabilities	3,334.3	3,282.7
Commitments and contingencies (Note 15)
Shareholder's equity
Common stock – $4 par value; 32,000,000 shares authorized; 23,896,962 shares issued and outstanding	95.6	95.6
Additional paid in capital	1,426.3	1,221.1
Retained earnings	645.3	623.1
Common shareholders' equity	2,167.2	1,939.8
Total liabilities and equity	$ 5,812.2	$ 5,641.6