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Debt And Interest Expense (Tables) | 12 Months Ended
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Dec. 31, 2023
Debt Disclosure [Abstract] |
Schedule of Debt [Table Text Block] | The following table summarizes information related to our Senior notes:
|  | Issuance Date | Maturity Date | Interest Rate | Principal
|  |  |  |  | As of December 31,
|  |  |  |  | 2023 |  | 2022
|  |  |  |  | (in millions except interest rates)
Senior notes due 2025 |  | March 27, 2015 | April 1, 2025 | 5.25 | % | $ | 500.0 |  |  | $ | 500.0 |
Senior notes due 2027 |  | July 5, 2017 | July 15, 2027 | 4.75 | % | 550.0 |  |  | 550.0 |
Senior notes due 2031 |  | June 8, 2021 | June 15, 2031 | 2.70 | % | 750.0 |  |  | 750.0 |
Principal amount of senior notes |  |  |  |  | 1,800.0 |  |  | 1,800.0 |
Less: unamortized issuance costs |  |  |  |  | (9.8) |  |  | (12.1) |
Total Senior notes |  |  |  |  | $ | 1,790.2 |  |  | $ | 1,787.9 |

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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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