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Inventories
 12 Months Ended
Dec. 31, 2015
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories consisted of the following:
 
December 31,
(dollars in millions)
2015
 
2014
 
 
 
 
Raw materials
$
106

 
$
159

Work-in-process
562

 
827

Finished goods, including parts and subassemblies
1,871

 
2,150

Other
20

 
24

 
2,559

 
3,160

Excess of current costs over LIFO costs
(73
)
 
(86
)
Allowance for obsolete and excess inventory
(126
)
 
(145
)
 
 
 
 
Total inventories
$
2,360

 
$
2,929