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Commitments, Contingencies and Legal Proceedings - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 1 Months Ended
Oct. 31, 2010
Defendant
Mar. 31, 2014
Decree
Participants
Operable_Unit
Entity
Nov. 30, 2007
Little Lake Butte Des Morts [Member]
site
Nov. 30, 2007
Appvion [Member]
site
Commitments Contingencies And Litigation [Line Items]        
Aggregate of response actions, response costs and NRDs   $ 1,000,000,000    
Number of entities   7    
Number of operable units   5    
Number of respondents directing to implement the cleanup of the Site downstream     7  
Number of respondents not liable for this site       1
Cost of response incurred by government   4,280,000    
Number of defendants 13      
Number of proposed consent decrees   3    
Cash settlement amount   56,600,000    
Reasonable outside estimate for cost of remediation made by Government to all parties   1,500,000,000    
Estimated future cost of work yet to be done   360,000,000    
Annual estimated cost rate seek by Government   70,000,000    
Initial minimum amount of NRD assessment   176,000,000    
Initial maximum amount of NRD assessment   333,000,000    
Revised minimum amount of NRD assessment   287,000,000    
Revised maximum amount of NRD assessment   423,000,000    
The limitations period for the NRD claims   3 years    
Reserve for environmental liabilities, current portion   100,000    
Reserve for claiming liability   16,300,000    
Maximum estimated percentage of discharge   27.00%    
Number of other PRP entered into interim cost-sharing agreement   6    
Maximum estimated cost related to Fox River matter   $ 275,000,000    
Period over which estimated cost accrued   10 years