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Investment in Unconsolidated Affiliate and Related Party Transactions Reconciliation of Equity in Earnings of Unconsolidated Affiliates (Details) (USD $)
In Millions, unless otherwise specified
8 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Equity Method Investments and Joint Ventures [Abstract]        
Proportionate Share of Unconsolidated Affiliate Net Income $ 82.1      
Equity in Earnings Amortization of Basis Difference 9.4      
Equity in Earnings Elimination of Fair Value Adjustments 10.4      
Equity in earnings of unconsolidated affiliates (Note 1) $ 101.9 $ 101.9 $ 0 $ 0