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2014 Organization Restructuring Narrative (Details) - 2014 Organization Restructuring - USD ($)
$ in Millions
9 Months Ended 24 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Restructuring Cost and Reserve      
Projected cash costs as a percentage of total charges 80.00%    
Cash payments $ 49 $ 65  
After Tax      
Restructuring Cost and Reserve      
Restructuring Charges 12 20 $ 149
Before Tax      
Restructuring Cost and Reserve      
Restructuring Charges 15 $ 36 211
Minimum | After Tax      
Restructuring Cost and Reserve      
Expected restructuring charges 130   130
Minimum | Before Tax      
Restructuring Cost and Reserve      
Expected restructuring charges 190   190
Maximum | After Tax      
Restructuring Cost and Reserve      
Expected restructuring charges 160   160
Maximum | Before Tax      
Restructuring Cost and Reserve      
Expected restructuring charges $ 230   $ 230