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Summary of Significant Accounting Policies - Financial Instruments (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Reported Value Measurement | 4.875% senior notes due 2030 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed-rate debt | $ 400.0 | $ 400.0
Level 2 | Estimate of Fair Value Measurement | 4.875% senior notes due 2030 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fixed-rate debt | 377.0 | 377.0
Money Market Funds | Fair Value, Recurring | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash equivalents, fair value | $ 534.8 | $ 679.5

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