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Realignment Charges (Tables)
6 Months Ended
Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]  
Restructuring and Related Costs [Table Text Block]
Realignment charges for the three and six months ended June 30, 2017 were as follows:
 
 
Three Months
 
Six Months
 
 
(in millions)
Employee separations
 
$
37

 
$
39

Advisory fees
 
1

 
10

Lease termination costs
 
1

 
1

Total realignment costs
 
$
39

 
$
50