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SHORT-TERM DEBT AND LINES OF CREDIT
 9 Months Ended
Sep. 30, 2023
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)September 30, 2023December 31, 2022
Commercial paper
Amount outstanding$1,545.3 $1,643.5 
Weighted-average interest rate on amounts outstanding 5.46 %4.64 %
Operating expense loans
Amount outstanding (1)
$4.0 $3.6 

(1)Coyote Ridge Wind, LLC, Tatanka Ridge, and Jayhawk 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.

Our average amount of commercial paper borrowings based on daily outstanding balances during the nine months ended September 30, 2023 was $1,053.3 million with a weighted-average interest rate during the period of 5.17%.
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)MaturitySeptember 30, 2023
WEC Energy GroupSeptember 2026$1,500.0 
WESeptember 2026500.0 
WPSSeptember 2026400.0 
WGSeptember 2026350.0 
PGLSeptember 2026350.0 
Total short-term credit capacity$3,100.0 
Less: 
Letters of credit issued inside credit facilities$2.3 
Commercial paper outstanding1,545.3 
Available capacity under existing agreements$1,552.4 

In October 2023, WEC Energy Group entered into a new $200.0 million credit facility that expires October 2024.