Investments - Investments in Privately-Held Companies (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Privately-held Companies
Investments in Privately-Held Companies and Investments in Equity Securities with Readily Determinable Fair Values
Investments in privately-held companies	$ 28.5	$ 28.5

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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