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Income Taxes Narrative (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Mar. 31, 2013
Sep. 30, 2014
Sep. 30, 2013
Income Tax Disclosure [Abstract]          
Income Tax Expense $ (39.3) $ (35.8) $ 70.9 $ (30.9) $ (70.9)
(Loss) Income before Income Taxes and Equity Income of Unconsolidated Entities 91.9 81.0 171.1 77.1 171.1
Domestic Tax Authority
         
Operating Loss Carryforwards [Line Items]          
Operating Loss Carryforwards $ 811     $ 811