Investments - Equity Securities without Readily Determinable Fair Value (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Investments, Debt and Equity Securities [Abstract] | ||
| Initial cost | $ 85.2 | $ 82.5 |
| Cumulative upward adjustments | 56.2 | 55.6 |
| Cumulative downward adjustments (including impairments) | (22.8) | (22.8) |
| Carrying value | $ 118.6 | $ 115.3 |
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- Definition Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment And Impairment Loss, Cumulative Amount No definition available.
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- Definition Equity Securities without Readily Determinable Fair Value, Initial Cost No definition available.
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- Definition Amount of investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cumulative gain from upward price adjustment on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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