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Fair Value - Schedule of Change in Fair Value for the Equity Investment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Equity Method Investments
Beginning balance	$ 796.3
Change in fair value	167.3	$ (44.4)
Ending balance	963.6
Indicor
Equity Method Investments
Beginning balance	796.3	772.3
Change in fair value	167.3	(44.1)
Ending balance	$ 963.6	$ 728.2

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Equity Method Investments

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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