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Fair Value Measurements - (Tables) | 9 Months Ended
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Sep. 30, 2023
Fair Value Disclosures [Abstract] |
Fair Value Option, Disclosures | The fair value of our debt is included in the following table:
| September 30, 2023 | December 31, 2022
2014 Notes, maturing 2025, fixed interest rate | $ | 262.6 |  | $ | 263.1 |
2020 Notes, maturing 2028, fixed interest rate | 234.4 |  | 241.2 |
| $ | 497.0 |  | $ | 504.3 |

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