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Inventories, Net
12 Months Ended
Dec. 31, 2015
Inventory Disclosure [Abstract]  
Inventories, Net
Inventories, Net

Inventories, net of reserves, by category were as follows:
 
December 31,
(Dollars in millions)
2015
 
2014
Raw materials, components and supplies
$
172

 
$
194

Work in process
61

 
135

Finished goods
2,111

 
2,758

 
$
2,344

 
$
3,087



Work in process and finished goods inventories include cost of materials, labor and manufacturing overhead. During 2015, 2014, and 2013, we recognized charges for excess and obsolete inventory totaling $186 million, $113 million and $62 million, respectively.