Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 9.8	$ 42.9
Accounts receivable and unbilled revenues, net of reserves of $162.8 and $193.5, respectively	1,669.3	1,503.2
Materials, supplies, and inventories	813.2	775.2
Prepaid Taxes	214.9	173.9
Other prepayments	82.6	76.8
Other	121.9	223.7
Current assets	2,911.7	2,795.7
Long-term assets
Property, plant, and equipment, net of accumulated depreciation and amortization of $11,611.9 and $11,073.1, respectively	34,645.4	31,581.5
Regulatory assets (December 31, 2024 and December 31, 2023 include $76.5 and $85.9, respectively, related to WEPCo Environmental Trust)	3,339.7	3,249.8
Equity investment in transmission affiliates	2,108.9	2,005.9
Goodwill	3,052.8	3,052.8
Pension and OPEB assets	968.5	870.9
Other	336.2	383.1
Long-term assets	44,451.5	41,144.0
Total assets	47,363.2	43,939.7
Current liabilities
Short-term debt	1,116.6	2,020.9
Current portion of long-term debt (December 31, 2024 and December 31, 2023 include $9.2 and $9.0, respectively, related to WEPCo Environmental Trust)	1,729.0	1,264.2
Accounts payable	1,137.1	896.6
Other	859.2	933.1
Current liabilities	4,841.9	5,114.8
Long-term liabilities
Long-term debt (December 31, 2024 and December 31, 2023 include $76.4 and $85.3, respectively, related to WEPCo Environmental Trust)	17,178.1	15,366.9
Finance lease obligations	303.3	145.9
Deferred income taxes	5,514.7	4,918.5
Deferred revenue, net	334.6	356.4
Regulatory liabilities	3,958.0	3,697.7
Intangible liabilities	566.8	594.8
Environmental remediation liabilities	445.8	463.7
AROs	580.0	374.2
Other	838.1	835.3
Long-term liabilities	29,719.4	26,753.4
Commitments and contingencies (Note 24)
Common shareholders' equity
Common stock – $0.01 par value; 650,000,000 shares authorized; 317,680,855 and 315,434,531 shares outstanding, respectively	3.2	3.2
Additional paid in capital	4,315.8	4,115.9
Retained earnings	8,083.8	7,612.8
Accumulated other comprehensive loss	(7.8)	(7.7)
Common shareholders' equity	12,395.0	11,724.2
Preferred stock of subsidiary	30.4	30.4
Noncontrolling interests	376.5	316.9
Total liabilities and equity	$ 47,363.2	$ 43,939.7