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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
	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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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

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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

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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

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