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Short-Term and Long-Term Debt (Tables) | 3 Months Ended
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Mar. 31, 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 March 31, 2022, and December 31, 2021:
March 31, 2022 | Principal |  | Unamortized Debt Issuance Costs |  | Total
Millions |  |  |  |  |
Short-Term Debt | $278.3 |  |  | $(0.2) |  | $278.1 |
Long-Term Debt | 1,677.8 |  |  | (8.4) |  | 1,669.4 |
Total Debt | $1,956.1 |  |  | $(8.6) |  | $1,947.5 |
December 31, 2021 | Principal |  | Unamortized Debt Issuance Costs |  | Total
Millions |  |  |  |  |
Short-Term Debt | $214.4 |  |  | $(0.2) |  | $214.2 |
Long-Term Debt | 1,772.0 |  |  | (8.8) |  | 1,763.2 |
Total Debt | $1,986.4 |  |  | $(9.0) |  | $1,977.4 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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