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Fair Value and Equity Investments, Equity Investments (Details) - Equity Securities [Member] - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2024 | Dec. 31, 2023
Equity Investments [Abstract] |  |  |
Carrying amount of equity securities without readily determinable fair values |  | $ 28.1 | $ 28.1
Other Income (Expense), Net [Member] |  |  |
Equity Investments [Abstract] |  |  |
Upward fair value adjustments on equity securities | $ 18.1 |  |

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- Definition Amount of investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479536/321-10-50-3 + Details
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