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SHORT-TERM DEBT AND LINES OF CREDIT (Tables) | 9 Months Ended
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Sep. 30, 2025
Short-Term Debt [Abstract] |
Schedule of short-term borrowings and weighted-average interest rates | The following table shows our short-term borrowings and their corresponding weighted-average interest rates:
(in millions, except percentages) |  | September 30, 2025 |  | December 31, 2024
Commercial paper |  |  |  |
Amount outstanding |  | $ | 1,256.1 |  |  | $ | 1,114.4 |
Weighted-average interest rate on amounts outstanding |  | 4.25 | % |  | 4.63 | %
Operating expense loans |  |  |  |
Amount outstanding (1) |  | $ | 4.5 |  |  | $ | 2.2 |
(1)Coyote Ridge Wind, LLC, Tatanka Ridge, Jayhawk, and Samson I 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 credit agreements and remaining available capacity | 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:
(in millions) |  | Maturity |  | September 30, 2025
WEC Energy Group (1) (2) |  | August 2030 |  | $ | 1,700.0 |
WE (1) |  | August 2030 |  | 800.0 |
PGL (1) |  | August 2030 |  | 600.0 |
WPS (1) |  | August 2030 |  | 450.0 |
WG (3) |  | August 2030 |  | 350.0 |
Total short-term credit capacity |  |  |  | $ | 3,900.0 |
Less: |  |  |  |
Letters of credit issued inside credit facilities |  |  |  | $ | 2.3 |
Commercial paper outstanding |  |  |  | 1,256.1 |
Available capacity under existing agreements |  |  |  | $ | 2,641.6 |
(1)In August 2025, the capacity of the credit facilities for each of WEC Energy Group, WE, PGL, and WPS were increased to $1,700.0 million, $800.0 million, $600.0 million, and $450.0 million, respectively, and the maturity for each facility was extended to August 2030. (2)In August 2025, WEC Energy Group terminated its $200.0 million bilateral credit facility. (3)In August 2025, WG extended the maturity of its credit facility to August 2030.

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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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