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Long-Term Debt - Interest Expense and Interest Income Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Debt Instrument [Line Items] |  |  |
Interest Expense | $ 201.7 | $ 174.5 | $ 195.2
Interest Costs Capitalized | $ 8.0 | $ 6.6 | $ 6.2
Long-term Debt, Weighted Average Interest Rate, at Point in Time | 7.10% | 6.60% | 5.60%
Investment Income, Interest | $ 26.2 | $ 17.0 | $ 10.9

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