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2014 Organization Restructuring Narrative (Details) - 2014 Organization Restructuring - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 21 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Restructuring Cost and Reserve          
Projected cash costs as a percentage of total charges     80.00%    
Cash payments     $ 40 $ 49  
After Tax          
Restructuring Cost and Reserve          
Restructuring Charges $ 1 $ 8 11 13 $ 148
Before Tax          
Restructuring Cost and Reserve          
Restructuring Charges 1 $ 12 15 $ 25 211
Minimum | After Tax          
Restructuring Cost and Reserve          
Expected restructuring charges 130   130   130
Minimum | Before Tax          
Restructuring Cost and Reserve          
Expected restructuring charges 190   190   190
Maximum | After Tax          
Restructuring Cost and Reserve          
Expected restructuring charges 160   160   160
Maximum | Before Tax          
Restructuring Cost and Reserve          
Expected restructuring charges $ 230   $ 230   $ 230