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Derivatives and Fair Value Measurements - Long-term debt (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt and Lease Obligation, Net	$ 337.3	$ 348.1
Carrying amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total debt at par value	342.1	354.4
Less: Unamortized debt issuance costs	(4.8)	(6.3)
Debt and Lease Obligation, Net	337.3	348.1
Estimated fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value	$ 501.1	$ 438.0

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Amount of short-term and long-term debt and lease obligation.

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