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	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Equity Securities without Readily Determinable Fair Value [Roll Forward]
Carrying value at the beginning of period		$ 45.8	$ 25.4	$ 7.5
Purchases		0.0	14.7	2.6
Impairments or downward adjustments	$ (16.1)	(31.6)	0.0	0.0
Upward adjustments		0.0	6.6	15.1
Currency translation on investments		(0.9)	(0.9)	0.2
Carrying value at the end of period		$ 13.3	$ 45.8	$ 25.4