XML 81 R63.htm IDEA: XBRL DOCUMENT v3.5.0.2
Commitments, Contingencies and Legal Proceedings - Additional Information (Detail)
 1 Months Ended 6 Months Ended 12 Months Ended
Oct. 14, 2014
USD ($)
Sep. 25, 2014
Jan. 31, 2008
Jun. 30, 2016
USD ($)
Operable_Unit
Dec. 31, 2015
USD ($)
Commitments Contingencies And Litigation [Line Items]          
Number of operable units | Operable_Unit       5  
Upper end estimate of total past and future response costs $ 1,100,000,000        
Estimated future cost of work yet to be done 575,000,000        
Reserve for Environmental liabilities, current portion       $ 11,361,000 $ 12,544,000
Cost of response incurred by government       4,280,000  
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  
Reserve for environmental liability, expected compensation payments 45,900,000        
Environmental loss contingencies 105,000,000        
Other prepaid loss contingencies for earlier settlements 59,000,000        
Maximum estimated percentage of discharge       27.00%  
Whiting Litigation [Member]          
Commitments Contingencies And Litigation [Line Items]          
Remaining costs and damages amount         33,000,000
NCR and GP [Member] | Whiting Litigation [Member]          
Commitments Contingencies And Litigation [Line Items]          
Costs and damages amount         67,000,000
NCR and GP [Member] | 2016 Work Plan [Member] | Whiting Litigation [Member]          
Commitments Contingencies And Litigation [Line Items]          
Annual estimated cost rate seek by Government       $ 100,000,000  
OU2-5 [Member]          
Commitments Contingencies And Litigation [Line Items]          
Estimated future cost of remediation         9,700,000
Estimated future cost of work yet to be done 100,000,000        
Annual estimated cost rate seek by Government       100,000,000  
NCR costs and damages percentage   100.00%      
OU2-5 [Member] | Whiting Litigation [Member]          
Commitments Contingencies And Litigation [Line Items]          
NCR costs and damages percentage     100.00%    
OU2-5 [Member] | 2015 Work Plan [Member]          
Commitments Contingencies And Litigation [Line Items]          
Annual remediation cost rate seek by Government         $ 100,000,000
OU1 [Member]          
Commitments Contingencies And Litigation [Line Items]          
Uncertainty premium for future response costs $ 100,000,000        
Natural Resource Damage Claims [Member]          
Commitments Contingencies And Litigation [Line Items]          
Litigation claim amount       35,100,000  
Natural Resource Damage Claims [Member] | Wisconsin Department [Member]          
Commitments Contingencies And Litigation [Line Items]          
Litigation claim amount       3,900,000  
Maximum [Member]          
Commitments Contingencies And Litigation [Line Items]          
Estimated cost related to Fox River matter       $ 190,000,000  
Period over which estimated cost to be incurred       3 years  
Maximum [Member] | OU2-5 [Member]          
Commitments Contingencies And Litigation [Line Items]          
Reserve for Environmental liabilities, current portion       $ 10,000,000  
Maximum [Member] | OU2-5 [Member] | 2016 Work Plan [Member] | Whiting Litigation [Member]          
Commitments Contingencies And Litigation [Line Items]          
Reserve for Environmental liabilities, current portion       $ 10,000,000  
Minimum [Member]          
Commitments Contingencies And Litigation [Line Items]          
Period over which estimated cost to be incurred       2 years  
Minimum [Member] | Appvion [Member]          
Commitments Contingencies And Litigation [Line Items]          
Litigation claim amount       $ 200,000,000