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Fair Value Measurements, Equity Investments and Other Financial Instruments - Schedule of Equity Investment Without Readily Determinable Fair Value (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
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Jun. 30, 2022 | Sep. 30, 2021 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Equity Securities without Readily Determinable Fair Value [Roll Forward] |  |  |  |  |  |
Carrying value at the beginning of period |  |  |  | $ 45.8 | $ 25.4 | $ 25.4
Purchases |  |  |  | 0.0 |  | 14.7
Impairments or downward adjustments | $ (16.1) |  | $ 0.0 | (31.6) | 0.0 | 0.0
Upward adjustments | 0.2 | $ 6.6 | $ 0.0 | 0.2 | $ 0.0 | 6.6
Currency translation on investments |  |  |  | (1.1) |  | (0.9)
Carrying value at the end of period | $ 13.1 |  |  | $ 13.1 |  | $ 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 -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117539-209714 + Details
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