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Long-Term Debt - Aggregate Maturities of Long-Term Debt (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Gross amounts due each year: |  |
2025 | $ 79.0 |
2026 | 45.4 |
2027 | 0.8 |
2028 | 0.9 |
2029 | 431.1 |
2030 and thereafter | 7.2 |
Subtotal | 564.4 |
Less amounts representing original issue discount and debt issuance costs | 1.0 |
Total debt | $ 563.4 | $ 546.5

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