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Investments in Affiliates and Other Related Party Transactions - Summarized Balance Sheet Data for Affiliates Accounted for under Equity Method (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]    
Current assets $ 6,776.7 $ 6,406.7
Non-current assets 6,421.9 6,274.0
Current liabilities 5,076.7 4,666.2
Non-current liabilities 3,507.0 3,395.0
Group of Equity Method Investments    
Schedule of Equity Method Investments [Line Items]    
Current assets 1,136.3 856.3
Non-current assets 194.4 173.9
Current liabilities 901.7 739.5
Non-current liabilities $ 6.2 $ 6.6