CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 28.5	$ 16.3
Accounts receivable and unbilled revenues, net of reserves of $168.5 and $198.3, respectively	1,321.8	1,505.7
Materials, supplies, and inventories	924.6	635.8
Prepaid taxes	124.3	182.1
Other prepayments	32.2	63.4
Derivative assets	191.0	107.0
Other	148.6	146.4
Current assets	2,771.0	2,656.7
Long-term assets
Property, plant, and equipment, net of accumulated depreciation and amortization of $10,348.8 and $9,889.3, respectively	28,575.3	26,982.4
Regulatory assets (September 30, 2022 and December 31, 2021 include $94.0 and $100.7, respectively, related to WEPCo Environmental Trust)	3,164.2	3,264.8
Equity investment in transmission affiliates	1,875.9	1,789.4
Goodwill	3,052.8	3,052.8
Pension and OPEB assets	965.8	881.3
Other	356.0	361.1
Long-term assets	37,990.0	36,331.8
Total assets	40,761.0	38,988.5
Current liabilities
Short-term debt	1,259.5	1,897.0
Current portion of long-term debt (September 30, 2022 and December 31, 2021 each include $8.8, respectively, related to WEPCo Environmental Trust)	167.2	169.4
Accounts payable	1,158.0	1,005.7
Customer credit balances	170.9	140.4
Other	614.1	540.5
Current liabilities	3,369.7	3,753.0
Long-term liabilities
Long-term debt (September 30, 2022 and December 31, 2021 include $98.5 and $102.7, respectively, related to WEPCo Environmental Trust)	14,910.7	13,523.7
Deferred income taxes	4,524.9	4,308.5
Deferred revenue, net	374.2	389.2
Regulatory liabilities	3,947.0	3,946.0
Environmental remediation liabilities	497.7	532.6
Pension and OPEB obligations	217.7	219.0
Other	1,323.0	1,203.2
Long-term liabilities	25,795.2	24,122.2
Commitments and contingencies (Note 22)
Common shareholders' equity
Common stock – $0.01 par value; 325,000,000 shares authorized; 315,434,531 shares outstanding	3.2	3.2
Additional paid in capital	4,113.5	4,138.1
Retained earnings	7,242.0	6,775.1
Accumulated other comprehensive loss	(3.2)	(3.2)
Common shareholders' equity	11,355.5	10,913.2
Preferred stock of subsidiary	30.4	30.4
Noncontrolling interests	210.2	169.7
Total liabilities and equity	$ 40,761.0	$ 38,988.5