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Summary of Significant Accounting Policies - Fair Value (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
2029 Senior Notes    
Debt Instrument [Line Items]    
Long-term debt, fair value $ 724.2 $ 672.7
2031 Senior Notes    
Debt Instrument [Line Items]    
Long-term debt, fair value $ 677.6 $ 627.1