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			12 Months Ended
	Mar. 31, 2022	Sep. 30, 2021	Mar. 31, 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	(15.5)		0.0	0.0
Upward adjustments		$ 6.6	$ 0.0
Currency translation on investments	(0.2)			(0.9)
Carrying value at the end of period	$ 30.1			$ 45.8