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Inventoried Costs, Net
 12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Inventoried Costs, Net
6. INVENTORIED COSTS, NET
Inventoried costs are primarily from contracts where the U.S. government is the primary customer, therefore the company does not believe it has significant exposure to recoverability risk related to these amounts.
Inventoried costs, net consisted of the following:
 
 
December 31
$ in millions
 
2018
 
2017
Production costs of contracts in process
 
$
402

 
$
312

G&A expenses
 
16

 
30

 
 
418

 
342

Progress and performance-based payments received
 
(41
)
 
(41
)
 
 
377

 
301

Product inventory and raw material
 
277

 
97

Inventoried costs, net
 
$
654

 
$
398