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Investments - Cost, Gross Unrealized Gains and Losses and Fair Value (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Cost	$ 53.2	$ 30.0
Unrealized gains	6.1	3.7
Unrealized losses	(8.0)	(1.4)
Fair value	$ 51.3	$ 32.3

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Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

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