Investments - Schedule of Cost, Gross Unrealized Gains and Losses and Fair Value (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2026	Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]
Cost	$ 42.0	$ 37.5
Unrealized gains	10.9	6.1
Unrealized losses	(9.2)	(8.8)
Fair value	$ 43.7	$ 34.8

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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