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Fair Value Measurements (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Asset, Fair Value, Gross Asset $ 0.8 $ 8.2
Cash Equivalents, at Carrying Value 21.5 18.8
Change in Carrying Value Verse Fair Value of Long Term Debt $ 4.2 $ 9.2