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Debt, Interest Income, Expense and Other Finance Costs - Aggregate Annual Maturities (Details) $ in Millions | Dec. 31, 2020 USD ($)
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Year Ended December 31, |
2021 | $ 24.3
2022 | 30.2
2023 | 29.2
2024 | 15.3
2025 | 422.2
Thereafter | 3.5
Total debt | $ 524.7

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