Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 28.9	$ 16.3
Accounts receivable and unbilled revenues, net of reserves of $199.3 and $198.3, respectively	1,818.4	1,505.7
Materials, supplies, and inventories	807.1	635.8
Prepaid Taxes	201.8	182.1
Other prepayments	69.8	63.4
Other	261.7	253.4
Current assets	3,187.7	2,656.7
Long-term assets
Property, plant, and equipment, net of accumulated depreciation and amortization of $10,383.8 and $9,889.3, respectively	29,113.8	26,982.4
Regulatory assets (December 31, 2022 and December 31, 2021 include $92.4 and $100.7, respectively, related to WEPCo Environmental Trust)	3,264.6	3,264.8
Equity investment in transmission affiliates	1,909.2	1,789.4
Goodwill	3,052.8	3,052.8
Pension and OPEB assets	916.7	881.3
Other	427.3	361.1
Long-term assets	38,684.4	36,331.8
Total assets	41,872.1	38,988.5
Current liabilities
Short-term debt	1,647.1	1,897.0
Current portion of long-term debt (December 31, 2022 and December 31, 2021 include $8.9 and $8.8, respectively, related to WEPCo Environmental Trust)	881.2	169.4
Accounts payable	1,198.1	1,005.7
Other	884.6	680.9
Current liabilities	4,611.0	3,753.0
Long-term liabilities
Long-term debt (December 31, 2022 and December 31, 2021 include $94.1 and $102.7, respectively, related to WEPCo Environmental Trust)	14,766.2	13,523.7
Deferred income taxes	4,625.6	4,308.5
Deferred revenue, net	370.7	389.2
Regulatory liabilities	3,735.5	3,946.0
Environmental remediation liabilities	499.6	532.6
Pension and OPEB obligations	171.6	219.0
Other	1,475.3	1,203.2
Long-term liabilities	25,644.5	24,122.2
Commitments and contingencies (Note 24)
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	4,115.2	4,138.1
Retained earnings	7,265.3	6,775.1
Accumulated other comprehensive loss	(6.8)	(3.2)
Common shareholders' equity	11,376.9	10,913.2
Preferred stock of subsidiary	30.4	30.4
Noncontrolling interests	209.3	169.7
Total liabilities and equity	$ 41,872.1	$ 38,988.5

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 9
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4531-111522