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Short-Term and Long-Term Debt (Tables)
3 Months Ended
Mar. 31, 2024
Debt Disclosure [Abstract]  
Schedule of Short-Term and Long-Term Debt
The following tables present the Company’s short-term and long-term debt as of March 31, 2024, and December 31, 2023:
March 31, 2024PrincipalUnamortized Debt Issuance CostsTotal
Millions  
Short-Term Debt$17.2 $17.2 
Long-Term Debt1,780.1 $(7.7)1,772.4 
Total Debt$1,797.3 $(7.7)$1,789.6 
December 31, 2023PrincipalUnamortized Debt Issuance CostsTotal
Millions  
Short-Term Debt $111.5 $(0.1)$111.4 
Long-Term Debt1,687.9 (8.0)1,679.9 
Total Debt$1,799.4 $(8.1)$1,791.3