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SHORT-TERM DEBT AND LINES OF CREDIT | 3 Months Ended
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Mar. 31, 2022
Short-term Debt [Abstract] |
SHORT-TERM DEBT AND LINES OF CREDIT | SHORT-TERM DEBT AND LINES OF CREDIT The following table shows our short-term borrowings and their corresponding weighted-average interest rates:
(in millions, except percentages) |  | March 31, 2022 |  | December 31, 2021
Commercial paper |  |  |  |
Amount outstanding |  | $ | 1,448.3 |  |  | $ | 1,896.1 |
Weighted-average interest rate on amounts outstanding |  | 0.92 | % |  | 0.26 | %
Operating expense loans |  |  |  |
Amount outstanding (1) |  | $ | 1.7 |  |  | $ | 0.9 |
(1)Coyote Ridge and Tatanka Ridge entered into operating expense loans. In accordance with their limited liability company operating agreements, they received loans from their noncontrolling interests in proportion to their ownership interests. Our average amount of commercial paper borrowings based on daily outstanding balances during the three months ended March 31, 2022 was $1,663.9 million with a weighted-average interest rate during the period of 0.38%. 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 |  | March 31, 2022
WEC Energy Group |  | September 2026 |  | $ | 1,500.0 |
WE |  | September 2026 |  | 500.0 |
WPS (1) |  | September 2026 |  | 400.0 |
WG |  | September 2026 |  | 350.0 |
PGL |  | September 2026 |  | 350.0 |
Total short-term credit capacity |  |  |  | $ | 3,100.0 |
Less: |  |  |  |
Letters of credit issued inside credit facilities |  |  |  | $ | 2.3 |
Commercial paper outstanding |  |  |  | 1,448.3 |
Available capacity under existing agreements |  |  |  | $ | 1,649.4 |
(1) In April 2022, WPS received approval from the PSCW to extend the maturity of its facility to September 2026.

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- Definition The entire disclosure for short-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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