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Long-Term Debt Narrative (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Long-Term Debt Narrative [Line Items]      
Long-term Debt, Weighted Average Interest Rate 6.40%   6.40%
Revolving Credit Facility [Member]      
Long-Term Debt Narrative [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity $ 523.5    
Line of Credit Facility, Remaining Borrowing Capacity 506.1    
Line of Credit Facility, Amount Outstanding 0.0   $ 0.0
Term Facility [Member]      
Long-Term Debt Narrative [Line Items]      
Debt Instrument, Periodic Payment, Principal 3.7    
Foreign Credit Facilities [Member]      
Long-Term Debt Narrative [Line Items]      
Line of Credit Facility, Amount Outstanding 37.5   $ 38.9
Debt Instrument, Unused Borrowing Capacity, Amount 43.3    
Class D [Member] | Revolving Credit Facility [Member]      
Long-Term Debt Narrative [Line Items]      
Line of Credit Facility, Standby Letters of Credit Issued Against the Facility $ 17.4    
Term Facility [Member]      
Long-Term Debt Narrative [Line Items]      
Debt Instrument, Periodic Payment, Principal   $ 3.7