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Long-Term Debt Leases (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Proceeds from sale-leaseback of equipment $ 24.1 $ 12.1 $ 0
Operating leases, future minimum payments due, current 19.6    
Operating leases, future minimum payments, due in two years 17.4    
Operating leases, future minimum payments, due in three years 15.5    
Operating leases, future minimum payments, due in four years 13.6    
Operating leases, future minimum payments, due in five years 6.8    
Operating lease expense 17.6 9.0 6.8
Purchase of previously idled assets, reduction of cost of goods sold   0.5  
Capital Lease Obligations [Member]
      
Capital leased assets, gross 6.7 6.7  
Capital leases, balance sheet, assets by major class, net $ 5.3 $ 5.6