Commitments, Contingencies and Legal Proceedings - Additional Information (Detail) (USD $)	0 Months Ended		1 Months Ended	6 Months Ended		1 Months Ended
	Mar. 26, 2014 Decree	May 01, 2013 Defendant	Oct. 31, 2010 Defendant	Jun. 30, 2014 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 other defendants to recover injunctions		3
Number of additional defendants entered into agreements		3
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