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Investments - Cost, Gross Unrealized Gains and Losses and Fair Value (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Cost	$ 30.0	$ 35.3
Unrealized gains	3.7	2.6
Unrealized losses	(1.4)	(0.0)
Fair value	$ 32.3	$ 37.9

X

- Definition

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.

+ References

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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