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Short-Term Debt and Lines of Credit (Tables) | 12 Months Ended
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Dec. 31, 2024
Short-Term Debt [Abstract] |
Short-term debt balances and their corresponding weighted-average interest rates | The following table shows our short-term borrowings and their corresponding weighted-average interest rates as of December 31:
(in millions, except percentages) |  | 2024 |  | 2023
Commercial paper |  |  |  |
Amount outstanding at December 31 |  | $ | 1,114.4 |  |  | $ | 2,017.2 |
Average interest rate on amounts outstanding at December 31 |  | 4.63 | % |  | 5.49 | %
Operating expense loans |  |  |  |
Amount outstanding at December 31 (1) |  | $ | 2.2 |  |  | $ | 3.7 |
(1) Coyote Ridge, Tatanka Ridge, and Jayhawk have entered into operating expense loans. In accordance with their limited liability company operating agreements, they received loans from the holders of their noncontrolling interests in proportion to their ownership interests.
Schedule of revolving credit facilities | The information in the table below relates to our revolving credit facilities used to support our commercial paper borrowing programs, including remaining available capacity under these facilities as of December 31:
(in millions) |  | Maturity |  | 2024
Revolving credit facility (WEC Energy Group) (1) |  | September 2026 |  | $ | 1,500.0 |
Revolving credit facility (WEC Energy Group) |  | October 2025 (2) |  | 200.0 |
Revolving credit facility (WE) (1) |  | September 2026 |  | 500.0 |
Revolving credit facility (WPS) (1) |  | September 2026 |  | 400.0 |
Revolving credit facility (WG) (1) |  | September 2026 |  | 350.0 |
Revolving credit facility (PGL) (1) |  | September 2026 |  | 350.0 |
Total short-term credit capacity |  |  |  | $ | 3,300.0 |
Less: |  |  |  |
Letters of credit issued inside credit facilities |  |  |  | $ | 2.3 |
Commercial paper outstanding |  |  |  | 1,114.4 |
Available capacity under existing facilities |  |  |  | $ | 2,183.3 |
(1) These revolving credit facilities have a renewal provision for two extensions, subject to lender approval. Each extension is for a period of one year. (2) On October 18, 2024, WEC Energy Group extended the maturity to October 28, 2025.

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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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- Definition Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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