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Investments - Equity Method Investments (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Equity Securities    
Equity method investments, beginning balance $ 99.6  
New investments 3.4  
Equity in (loss) earnings of unconsolidated affiliates, net (0.3) $ 0.1
Foreign currency translation adjustments and other (0.6)  
Equity method investments, ending balance 100.9  
Equity Method Investment, Nonconsolidated Investee or Group of Investees    
Equity Securities    
Equity method investments, beginning balance 99.6  
New investments 0.5  
Equity in (loss) earnings of unconsolidated affiliates, net (0.4)  
Foreign currency translation adjustments and other 1.2  
Equity method investments, ending balance $ 100.9