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Equity Method Investments in Affiliates - Financial Information for Affiliates Accounted for Under the Equity Method (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]      
Net income $ 890.1 $ 427.0 $ 305.1
Assets 8,876.4 7,888.9  
Equity Method Investee      
Schedule of Equity Method Investments [Line Items]      
Revenues 3,228.1 2,659.7 2,760.9
Net income 1,656.6 1,061.8 $ 1,061.3
Assets 3,607.7 2,958.9  
Liabilities and Non-controlling interests $ 1,422.7 $ 1,245.5