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SHORT-TERM DEBT AND LINES OF CREDIT (Tables)
 9 Months Ended
Sep. 30, 2021
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, 2021December 31, 2020
Commercial paper
Amount outstanding$1,508.4 $1,436.9 
Weighted-average interest rate on amounts outstanding 0.16 %0.21 %
Term loan
Amount outstanding$— $340.0 
Weighted-average interest rate on amounts outstandingN/A0.99 %
Operating expense loans
Amount outstanding (1)
$0.5 $— 

(1)Coyote Ridge and Tatanka Ridge entered into operating expense loans and borrowed funds from their noncontrolling interests. In accordance with their limited liability company operating agreements, Coyote Ridge and Tatanka Ridge received loans from their owners 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)MaturitySeptember 30, 2021
WEC Energy Group (1)
September 2026$1,500.0 
WE (1)
September 2026500.0 
WPS (2)
October 2022400.0 
WG (1)
September 2026350.0 
PGL (1)
September 2026350.0 
Total short-term credit capacity$3,100.0 
Less: 
Letters of credit issued inside credit facilities$2.3 
Commercial paper outstanding1,508.4 
Available capacity under existing agreements$1,589.3 

(1)    In September 2021, WEC Energy Group increased its credit facility to $1,500.0 million, and each of WEC Energy Group, WE, WG, and PGL extended the maturities of their credit facilities to September 2026.

(2)    WPS intends to request approval from the PSCW to extend the maturity of its facility to September 2026.