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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories, Net
Inventories, net consists of the following:
 
December 31,
  
2014
 
2013
 
(in millions)
Raw materials
$
450

 
$
499

Work in process
244

 
252

Finished goods
1,185

 
1,151

 
$
1,879

 
$
1,902