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Commitments and Contingencies (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Jun. 30, 2013
Fox River Site [Member]
Dec. 31, 2012
Fox River Site [Member]
facility
entity
Jun. 30, 2009
Fox River Site [Member]
Jun. 30, 2013
Total Clean Up Costs, Fox River Site [Member]
Jun. 30, 2013
Total Natrual Resource Damages, Fox River Site [Member]
Jun. 30, 2013
Total Natrual Resource Damages, Fox River Site [Member]
Maximum [Member]
Jun. 30, 2013
Total Natrual Resource Damages, Fox River Site [Member]
Minimum [Member]
Jun. 30, 2013
Fox River LLC [Member]
Dec. 31, 2012
Fox River LLC [Member]
Jun. 30, 2013
Pending or Threatened Litigation [Member]
Apr. 10, 2012
Pending or Threatened Litigation [Member]
Jun. 30, 2013
Kalamazoo River Site [Member]
Jun. 30, 2013
API [Member]
Pending or Threatened Litigation [Member]
Loss Contingencies [Line Items]                          
Pecentage of Arbitration Award                     60.00%    
Amount Recorded by Related Party Under Arbitration Award                   $ 63.0      
Fox River LLC Funding Remainder Other Current Asset               5 3        
Promissory Note, Original Maximum Obligation     20                    
Promissory Note, Current Maximum Obligation 13                        
Portion Of Costs Below Threshold, Percentage 45.00%                        
Threshold For Environmental Cleanup Costs 75                        
Accounts Receivable, Gross                         53
Portion Of Costs Exceeding Threshold, Percentage 40.00%                        
Number of Defendants                       3  
Estimated Total Clean Up Costs 827                        
Percentage Contingency for Probable Cost Overruns       5.00%                  
Estimated Total NRD Costs         76                
Estimated Maximum NRD Costs           246 0            
Estimated Federal Government Maximum NRD Costs         382                
Anticipated Allocable Total Site Costs, Maximum 100.00%                        
Net Loss Contingency Accrual               109 115        
Estimate of AT&T and Actel-Lucent's Portion of Payout, Recorded As Long Term Asset 71 84                      
Total Amount Received from Settlements with Insurance Carriers 162                        
Portion of Insurance Settlements Subject to Competing Claims 9                        
NCRs Agreed Upon Share of Insurance Settlements Subject to Competing Claims 4                        
Alleged Portion Of GP Clean Up Costs                       79  
Number of Potentially Responsible Parties   8                      
Number of Sites Previously Owned Allegedly Responsible for PCB Discharges   2                      
Additional Potentially Responsible Parties   4                      
Amounts Paid By Third Party For Government Cost 7                        
Amounts Paid by Settling Parties $ 5                        
Number of Defendants With Asserted Cross Claims                       2