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Summary of Significant Accounting Policies - Summary Of Unrealized Gain (Loss) On Investment (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2022
Debt and Equity Securities, Gain (Loss) [Abstract] |  |
Gain (loss) on equity securities | $ (39.6) | $ 242.7
Net gain recognized on equity securities sold | 6.7 | 175.7
Unrealized gain (loss) on equity securities sold | $ (46.3) | $ 67.0

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