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Commitments and Contingencies - Additional Information (Details) (USD $)
In Millions, unless otherwise specified
 2 Months Ended 12 Months Ended
Oct. 31, 2010
Dec. 31, 2013
acre
Dec. 31, 2012
Dec. 31, 2011
Schedule Of Commitments And Contingencies [Line Items]        
Capital commitments   $ 151.4 $ 27.0  
Area leased under timberland cutting rights (acres)   88,000    
Total lease expense   56.0 49.4 46.1
Capital lease obligations   24.9 25.9  
Purchase commitments term, years   periods ranging from one to 15 years    
Purchases during period under purchase agreements   61.7 27.7 28.5
Environmental remediation expense to date   3.2    
Environmental reserve   34.1    
Number of other U.S. and Canadian containerboard producers PCA and eight other U.S. and Canadian containerboard producers were named as defendants      
Number of lawsuits filed by the plaintiffs 5      
Operating Leases
        
Schedule Of Commitments And Contingencies [Line Items]        
Lease term, years   Lease terms range from one to 15 years    
Capital Lease Obligations
        
Schedule Of Commitments And Contingencies [Line Items]        
Interest paid, capital lease obligations   1.7 1.7 1.5
Asset Retirement Obligation
        
Schedule Of Commitments And Contingencies [Line Items]        
Environmental reserve   26.5    
Environmental Contingencies
        
Schedule Of Commitments And Contingencies [Line Items]        
Environmental reserve   7.6    
Accrued Liabilities
        
Schedule Of Commitments And Contingencies [Line Items]        
Environmental reserve   7.8    
Other Long-Term Liabilities
        
Schedule Of Commitments And Contingencies [Line Items]        
Environmental reserve   $ 26.3