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Investments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025
Schedule of Equity Method Investments [Line Items]
Equity securities, without a readily determinable fair value	$ 139.9	$ 139.9		$ 147.3
Alight
Schedule of Equity Method Investments [Line Items]
Aggregate value of ownership based on quoted market price	22.7	22.7
AmeriLife and Other
Schedule of Equity Method Investments [Line Items]
Equity securities, without a readily determinable fair value	139.9	139.9		$ 147.3
SpaceX
Schedule of Equity Method Investments [Line Items]
Equity securities, without a readily determinable fair value			$ 27.5
Unrealized gain	$ 83.4	$ 83.4

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