CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 5.5	$ 7.2
Accounts receivable and unbilled revenues, net of reserves of $47.1 and $59.3, respectively	576.1	466.1
Accounts receivable from related parties	60.6	67.9
Materials, supplies, and inventories	226.1	219.5
Prepaid taxes	68.9	98.5
Derivative assets	85.5	6.2
Other	19.9	30.2
Current assets	1,042.6	895.6
Long-term assets
Property, plant, and equipment, net of accumulated depreciation and amortization of $5,066.2 and $4,849.2, respectively	9,974.4	9,789.9
Regulatory assets (September 30, 2021 includes $102.9 related to WEPCo Environmental Trust)	2,809.1	2,803.3
Other	143.4	116.4
Long-term assets	12,926.9	12,709.6
Total assets	13,969.5	13,605.2
Current liabilities
Short-term debt	22.5	292.0
Current portion of long-term debt (September 30, 2021 includes $8.5 related to WEPCo Environmental Trust)	8.5	300.0
Current portion of finance lease obligations	71.2	66.8
Accounts payable	324.9	261.2
Accounts payable to related parties	160.9	172.0
Accrued payroll and benefits	43.7	43.3
Accrued taxes	56.2	25.0
Other	155.0	97.1
Current liabilities	842.9	1,257.4
Long-term liabilities
Long-term debt (September 30, 2021 includes $107.0 related to WEPCo Environmental Trust)	2,867.1	2,461.2
Finance lease obligations	2,733.6	2,774.4
Deferred income taxes	1,382.0	1,357.2
Regulatory liabilities	1,777.4	1,703.7
Pension and OPEB obligations	63.8	85.9
Other	284.1	272.8
Long-term liabilities	9,108.0	8,655.2
Commitments and contingencies (Note 18)
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	1,290.8	1,060.1
Retained earnings	2,364.5	2,269.2
Common shareholder's equity	3,988.2	3,662.2
Preferred stock	30.4	30.4
Total liabilities and equity	$ 13,969.5	$ 13,605.2