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Summary of Significant Accounting Policies - Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
2029 Senior Notes
Debt Instrument [Line Items]
Long-term debt, fair value	$ 746.7	$ 724.2
2031 Senior Notes
Debt Instrument [Line Items]
Long-term debt, fair value	$ 714.2	$ 677.6

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- Definition

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