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Investment in Unconsolidated Affiliate and Related Party Transactions Summarized Balance Sheet Information of Equity Method Investment (Details) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Summarized Financial Information of Equity Method Investment [Line Items]    
Current assets $ 379.0 $ 381.0
Non-current assets 10,870.0 10,857.0
Current liabilities 279.0 615.0
Non-current liabilities $ 3,123.0 $ 3,092.0