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Equity Method Investments in Affiliates - Change in Equity Method Investments in Affiliates (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Change in Equity Method Investments in Affiliates [Roll Forward]      
Balance, beginning of period $ 2,074.8    
Distributions of earnings (337.5) $ (236.8) $ (252.4)
Balance, end of period 2,134.4 2,074.8  
Equity Method Investee      
Change in Equity Method Investments in Affiliates [Roll Forward]      
Balance, beginning of period 2,074.8 2,195.6  
Investments in Affiliates 147.3 128.7  
Earnings 417.5 288.6  
Intangible amortization and impairments (175.0) (332.0)  
Distributions of earnings (337.5) (236.8)  
Return of capital (4.4) 0.0  
Foreign currency translation 12.5 5.1  
Other (0.8) 25.6  
Balance, end of period $ 2,134.4 $ 2,074.8 $ 2,195.6