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Fair Value Measurements (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Asset, Fair Value, Gross Asset $ 2.3 $ 0.4
Derivative Liability, Fair Value, Gross Liability 5.8 8.9
Cash Equivalents, at Carrying Value $ 16.9 $ 13.6