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Objectives And Strategies For Using Derivatives Summary of total and undesignated fair values of derivative instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2016
Dec. 31, 2015
Derivative    
Assets $ 51 $ 56
Liabilities 41 42
Foreign currency exchange contracts    
Derivative    
Assets 42 56
Liabilities 35 27
Interest Rate Contract    
Derivative    
Assets 7 0
Liabilities 0 0
Commodity price contracts    
Derivative    
Assets 2 0
Liabilities $ 6 $ 15