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Commitments and Contingencies (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 6 Months Ended
Dec. 31, 2009
Dec. 31, 2011
Commission Arrangement Lawsuit [Member]
Jun. 30, 2012
Fox River Site [Member]
Dec. 31, 2011
Fox River Site [Member]
Jun. 30, 2009
Fox River Site [Member]
Jun. 30, 2012
Total Clean Up Costs, Fox River Site [Member]
Jun. 30, 2012
Total Natrual Resource Damages, Fox River Site [Member]
Jun. 30, 2012
Total Natrual Resource Damages, Fox River Site [Member]
Maximum [Member]
Jun. 30, 2012
Total Natrual Resource Damages, Fox River Site [Member]
Minimum [Member]
Jun. 30, 2012
Fox River LLC [Member]
Dec. 31, 2011
Fox River LLC [Member]
Jun. 30, 2012
Kalamazoo River Site [Member]
Loss Contingencies [Line Items]                        
Loss Contingency Accrual, at Carrying Value   $ 8                    
Fox River LLC Funding Remainder Other Current Asset                   0 1  
Promissory Note, Original Maximum Obligation         20              
Promissory Note, Current Maximum Obligation     15                  
Portion Of Costs Below Threshold, Percentage     45.00%                  
Threshold For Environmental Cleanup Costs     75                  
Portion Of Costs Exceeding Threshold, Percentage     40.00%                  
Number of Defendants                       3
Consent Decrees Filed By Government 12                      
Estimated Total Clean Up Costs     852                  
Percentage Contingency for Probable Cost Overruns           15.00%            
Estimated Total Clean Up Costs With Additional Overrun Contingency           898            
Estimated Total NRD Costs             76          
Estimated Maximum NRD Costs               246 0      
Estimated Federal Government Maximum NRD Costs             382          
Loss Contingency, Potential Reserve Increase Amount     19                  
Anticipated Allocable Total Site Costs, Maximum     100.00%                  
Net Loss Contingency Accrual                   148 160  
Estimate of AT&T and Actel-Lucent's Portion of Payout, Recorded As Long Term Asset     79 79                
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                  
Judgement Against Insurance Company, Amount Awarded, Pending Appeal     5                  
Alleged Portion Of GP Clean Up Costs                       $ 79
Number of Potentially Responsible Parties     8                  
Additional Potentially Responsible Parties     4                  
Number of Insurance Companies Not Settled     1