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Inventories and Contracts in Progress (Tables)
 9 Months Ended
Sep. 30, 2015
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
(Dollars in millions)
September 30, 2015
 
December 31, 2014
Raw materials
$
1,695

 
$
1,683

Work-in-process
2,519

 
2,099

Finished goods
3,654

 
3,234

Contracts in progress
8,685

 
8,189

 
16,553

 
15,205

Less:
 
 
 
Progress payments, secured by lien, on U.S. Government contracts
(270
)
 
(117
)
Billings on contracts in progress
(7,830
)
 
(7,446
)
 
$
8,453

 
$
7,642