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Summary of Significant Accounting Policies - Summary of Investments in Privately Held Equity Securities (Details)
$ in Millions
9 Months Ended
Sep. 30, 2023
USD ($)
Increase (Decrease) In Equity Investments [Roll Forward]  
Equity investments as of December 31, 2022 $ 40.5
Fair market adjustments 14.4
Impairment losses (2.3)
Additional investments 0.5
Equity investments as of September 30, 2023 $ 53.1