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Transactions With Related Party (Details) - Unconsolidated variable interest entity [Member] - Louisiana Timber Procurement Company, L.L.C. (LTP) [Member] - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Related Party Transaction [Line Items]        
Variable interest entity, ownership percentage     50.00%  
Revenue from related parties $ 4.5 $ 5.0 $ 9.2 $ 11.3
Related parties amount in cost of sales $ 21.9 $ 23.2 $ 43.4 $ 45.1
Packaging Corporation of America (PCA) [Member]        
Related Party Transaction [Line Items]        
Variable interest entity, ownership percentage     50.00%