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2014 Organization Restructuring Narrative (Details) - 2014 Organization Restructuring - USD ($)
$ in Millions
12 Months Ended 27 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Restructuring Cost and Reserve      
Payments for Restructuring $ 60 $ 86  
After Tax      
Restructuring Cost and Reserve      
Restructuring Charges 27 42 $ 164
Before Tax      
Restructuring Cost and Reserve      
Restructuring Charges 35 $ 63 $ 231
Corporate and Other      
Restructuring Cost and Reserve      
Restructuring Charges $ 38