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Short-Term Borrowings (Tables)
3 Months Ended
Mar. 31, 2023
Debt Disclosure [Abstract]  
Schedule of Line of Credit
   (Millions)         
   As of March 31, 2023         
   Outstanding  Available  Maximum  Credit Type  Renewal Date
Bank of America  $5.0   $55.0   $60.0    Uncommitted  January 25, 2024
PNC Bank   22.5   $45.5    68.0    Committed  January 31, 2025
CoBank   1.0    11.0    12.0    Committed  November 30, 2023
   $28.5   $111.5   $140.0       

 

Schedule of information regarding short-term borrowings
   (In Thousands)
   Three Months
   March 31,
   2023  2022
Average Daily Amounts Outstanding  $54,561   $13,444 
Weighted Average Interest Rates   5.52%    1.12%