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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, 2016
Restructuring Cost and Reserve    
Payments for Restructuring $ 60  
After Tax    
Restructuring Cost and Reserve    
Restructuring Charges 27 $ 164
Before Tax    
Restructuring Cost and Reserve    
Restructuring Charges $ 35 $ 231