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Debt and Credit Arrangements - Interest Expense (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Line of Credit Facility |  |  |
Financing costs amortization | $ 19.1 | $ 17.2 | $ 2.9
Total interest expense | 328.5 | 289.1 | 31.7
Revolving Credit Facility |  |  |
Line of Credit Facility |  |  |
Capitalized interest | (6.3) | (4.6) | (0.9)
Total interest expense | 335.7 | 320.5 | 33.7
Revolving Credit Facility | Term loans due March 2030 |  |  |
Line of Credit Facility |  |  |
Interest expense, debt | 133.0 | 119.5 | 0.0
Revolving Credit Facility | Senior secured notes due 2030 |  |  |
Line of Credit Facility |  |  |
Interest expense, debt | 108.9 | 109.7 | 3.0
Revolving Credit Facility | Senior unsecured notes due 2031 |  |  |
Line of Credit Facility |  |  |
Interest expense, debt | 48.2 | 48.6 | 1.3
Revolving Credit Facility | Senior Secured Revolving Credit Facilities due 2029 |  |  |
Line of Credit Facility |  |  |
Interest expense, debt | 30.3 | 27.7 | 23.4
Revolving Credit Facility | Convertible notes due November 2024 |  |  |
Line of Credit Facility |  |  |
Interest expense, debt | $ 2.5 | $ 2.4 | $ 4.0

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