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Short-Term and Long-Term Debt (Tables)
6 Months Ended
Jun. 30, 2022
Debt Disclosure [Abstract]  
Schedule of Short-Term and Long-Term Debt [Table Text Block]
The following tables present the Company’s short-term and long-term debt as of June 30, 2022, and December 31, 2021:
June 30, 2022PrincipalUnamortized Debt Issuance CostsTotal
Millions  
Short-Term Debt$390.7 $(0.2)$390.5 
Long-Term Debt1,603.7 (8.1)1,595.6 
Total Debt$1,994.4 $(8.3)$1,986.1 
December 31, 2021PrincipalUnamortized Debt Issuance CostsTotal
Millions  
Short-Term Debt $214.4 $(0.2)$214.2 
Long-Term Debt1,772.0 (8.8)1,763.2 
Total Debt$1,986.4 $(9.0)$1,977.4