CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 4.7	$ 7.2
Accounts receivable and unbilled revenues, net of reserves of $71.3 and $59.3, respectively	565.9	466.1
Accounts receivable from related parties	50.0	67.9
Materials, supplies, and inventories	209.1	219.5
Prepaid taxes	92.0	98.5
Other	46.1	36.4
Current assets	967.8	895.6
Long-term assets
Property, plant, and equipment, net of accumulated depreciation and amortization of $4,989.1 and $4,849.2, respectively	9,885.0	9,789.9
Regulatory assets (June 30, 2021 includes $106.0 related to WEPCo Environmental Trust)	2,790.6	2,803.3
Other	139.5	116.4
Long-term assets	12,815.1	12,709.6
Total assets	13,782.9	13,605.2
Current liabilities
Short-term debt	202.0	292.0
Current portion of long-term debt (June 30, 2021 includes $4.1 related to WEPCo Environmental Trust)	4.1	300.0
Current portion of finance lease obligations	71.0	66.8
Accounts payable	306.6	261.2
Accounts payable to related parties	163.8	172.0
Accrued payroll and benefits	45.9	43.3
Accrued taxes	30.6	25.0
Other	115.8	97.1
Current liabilities	939.8	1,257.4
Long-term liabilities
Long-term debt (June 30, 2021 includes $111.1 related to WEPCo Environmental Trust)	2,871.0	2,461.2
Finance lease obligations	2,747.0	2,774.4
Deferred income taxes	1,376.8	1,357.2
Regulatory liabilities	1,700.8	1,703.7
Pension and OPEB obligations	70.9	85.9
Other	267.6	272.8
Long-term liabilities	9,034.1	8,655.2
Commitments and contingencies (Note 17)
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	1,090.7	1,060.1
Retained earnings	2,355.0	2,269.2
Common shareholder's equity	3,778.6	3,662.2
Preferred stock	30.4	30.4
Total liabilities and equity	$ 13,782.9	$ 13,605.2