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Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2014
Commitments and Contingencies  
Accrued Liabilities and Insurance Receivables Related to Legal Proceedings
Liability and Receivable Balances      
(Millions)  September 30, 2014  December 31, 2013
     
Respirator mask/asbestos liabilities  $ 175 $ 152
Respirator mask/asbestos insurance receivables    41   58
       
Environmental remediation liabilities  $ 26 $ 27
Environmental remediation insurance receivables    11   11
       
Other environmental liabilities  $ 44 $ 48
Other environmental insurance receivables   15   15