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Investments - Schedule of Investments in Marketable Securities and Other Investments (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
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Investments, Debt and Equity Securities [Abstract] |  |  |  |  |  |
Equity securities | $ 37.1 |  | $ 32.3 |  |  |
Debt securities | 48.4 |  | 24.3 |  |  |
Total investments in marketable securities | 85.5 |  | 56.6 |  |  |
Investments measured at NAV as a practical expedient | 523.8 |  | 488.6 |  |  |
Investments without readily determinable fair values | 50.4 | $ 50.4 | 50.4 | $ 50.4 | $ 50.4 | $ 50.4
Total other investments | 574.2 | $ 566.1 | 539.0 | $ 532.8 | $ 530.3 | $ 480.9
Investments | $ 659.7 |  | $ 595.6 |  |  |

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