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Fair Value Measurements - Summary of Assets Measured at Fair Value on Non Recurring Basis (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Non-marketable equity securities |  | $ 224.1 |  | $ 395.8 |  |
Non Marketable Equity Securities |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Non-marketable equity securities |  | 224.1 |  | 395.8 |  | $ 441.3
Non Marketable Equity Securities | Non-recurring Basis |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Non-marketable equity securities | [1] | 95.1 | [2] | 117.3 | [3] |
Non Marketable Equity Securities | Level 1 | Non-recurring Basis |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Non-marketable equity securities | [1] | 0.0 | [2] | 0.0 | [3] |
Non Marketable Equity Securities | Level 2 | Non-recurring Basis |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Non-marketable equity securities | [1] | 56.5 | [2] | 107.3 | [3] |
Non Marketable Equity Securities | Level 3 | Non-recurring Basis |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Non-marketable equity securities | [1] | $ 38.6 | [2] | $ 10.0 | [3] |
[1] | Estimated fair values were determined during the year as of the dates that either an observable transaction occurred or an impairment assessment was made.
[2] | Excludes $129.0 million of non-marketable equity securities for which no observable price changes or impairment charges occurred during the year ended December 31, 2023.
[3] | Excludes $278.5 million of non-marketable equity securities for which no observable price changes or impairment charges occurred during the year ended December 31, 2022.

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