CONDENSED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 2.7	$ 0.5
Accounts receivable and unbilled revenues, net of reserves of $13.2 and $11.7, respectively	264.2	267.8
Accounts receivable from related parties	25.8	31.8
Materials, supplies, and inventories	140.2	164.5
Prepaid taxes	39.1	58.4
Other prepayments	4.4	6.0
Collateral on deposit	40.6	26.6
Other	4.4	9.5
Current assets	521.4	565.1
Long-term assets
Property, plant, and equipment, net of accumulated depreciation and amortization of $1,925.3 and $1,820.6, respectively	5,444.3	5,376.7
Regulatory assets	375.4	365.5
Goodwill	36.4	36.4
Pension and OPEB assets	288.2	282.1
Other	50.8	83.0
Long-term assets	6,195.1	6,143.7
Total assets	6,716.5	6,708.8
Current liabilities
Short-term debt	45.0	194.9
Accounts payable	118.5	176.9
Accounts payable to related parties	50.8	49.8
Accrued payroll and benefits	20.0	22.4
Accrued interest	27.3	12.0
Amounts refundable to customers	36.3	9.9
Derivative liabilities	26.8	16.3
Customer credit balances	20.0	20.1
Other	12.7	17.5
Current liabilities	357.4	519.8
Long-term liabilities
Long-term debt	2,000.1	1,999.9
Deferred income taxes	870.7	860.7
Deferred ITCs	77.5	78.5
Regulatory liabilities	648.6	650.3
Environmental remediation liabilities	84.5	88.6
Other	128.0	127.7
Long-term liabilities	3,809.4	3,805.7
Commitments and contingencies (Note 17)
Common 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	1,781.9	1,616.8
Retained earnings	672.2	670.9
Common shareholders' equity	2,549.7	2,383.3
Total liabilities and equity	$ 6,716.5	$ 6,708.8