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Inventories and Contracts in Progress (Tables)
 12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Inventory Table [Table Text Block]
(dollars in millions)
2016
 
2015
Raw materials
$
2,040

 
$
2,037

Work-in-process
2,787

 
2,422

Finished goods
3,305

 
3,183

Contracts in progress
9,395

 
8,668

 
17,527

 
16,310

Less:
 
 
 
Progress payments, secured by lien, on U.S. Government contracts
(130
)
 
(239
)
Billings on contracts in progress
(8,693
)
 
(7,936
)
 
$
8,704

 
$
8,135