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Fair Value Measurements, Equity Investments and Other Financial Instruments - Equity Investment Without Readily Determinable Fair Value (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2020 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Equity Securities without Readily Determinable Fair Value [Roll Forward] |  |  |  |  |  |
Carrying value at the beginning of period |  | $ 45.8 |  | $ 13.3 | $ 45.8 | $ 25.4
Purchases |  |  |  | 0.0 | 0.0 | 14.7
Impairments or downward adjustments | $ (16.1) | $ (15.5) |  | 0.0 | (31.6) | 0.0
Upward adjustments |  |  | $ 15.1 | 0.0 | 0.0 | 6.6
Currency translation on investments |  |  |  | 0.5 | (0.9) | (0.9)
Carrying value at the end of period | $ 0.0 |  | $ 25.4 | $ 13.8 | $ 13.3 | $ 45.8

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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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- Definition Amount of loss from downward price adjustment on 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 (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479536/321-10-50-3 + Details
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- Definition Amount of gain from upward price adjustment on 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 (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479536/321-10-50-3 + Details
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