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Investment in Unconsolidated Affiliates Summarized Balance Sheet Information of Equity Method Investment (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]    
Assets, Current $ 499.0 $ 430.2
Liabilities, Current 594.6 657.9
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]    
Schedule of Equity Method Investments [Line Items]    
Assets, Current 374.0 389.0
Assets, Noncurrent 11,687.0 11,877.0
Liabilities, Current 290.0 780.0
Liabilities, Noncurrent $ 4,454.0 $ 4,077.0