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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