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Debt and Credit Arrangements - Interest Expense and Financing Cost Amortization (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Line of Credit Facility |  |  |
Interest expense, debt | $ 299.0 |  |
Financing costs amortization | 17.2 | $ 2.9 | $ 8.3
Revolving Credit Facility |  |  |
Line of Credit Facility |  |  |
Interest expense, debt | 147.2 | 23.4 | 9.0
Financing costs amortization | 5.9 | 1.9 | 7.4
Revolving Credit Facility | Senior Secured Revolving Credit Facilities due 2026 |  |  |
Line of Credit Facility |  |  |
Interest expense, debt | 27.7 | 23.4 | 2.5
Financing costs amortization | 2.3 | 1.9 | 0.4
Revolving Credit Facility | Term Long due June 2024 |  |  |
Line of Credit Facility |  |  |
Interest expense, debt | 0.0 | 0.0 | 1.8
Financing costs amortization | 0.0 | 0.0 | 2.9
Revolving Credit Facility | Term Loan 2030 Credit Facility |  |  |
Line of Credit Facility |  |  |
Interest expense, debt | 119.5 | 0.0 | 0.0
Financing costs amortization | 3.6 | 0.0 | 0.0
Revolving Credit Facility | Senior Secured Revolving Credit Facility And Term Loan 2024 Credit Facility |  |  |
Line of Credit Facility |  |  |
Financing costs amortization | 0.0 | 0.0 | 3.8
Revolving Credit Facility | Senior Secured Revolving Credit Facilities due 2024 |  |  |
Line of Credit Facility |  |  |
Interest expense, debt | 0.0 | 0.0 | 4.7
Revolving Credit Facility | Senior Secured Revolving Credit Facility 2024 |  |  |
Line of Credit Facility |  |  |
Financing costs amortization | $ 0.0 | $ 0.0 | $ 0.3

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