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Inventoried Costs, Net (Tables)
 12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventoried Costs
Inventoried costs, net consisted of the following:
 
 
December 31
$ in millions
 
2019
 
2018
Production costs of contracts in process
 
$
476

 
$
402

G&A expenses
 
31

 
16

 
 
507

 
418

Progress and performance-based payments received
 
(41
)
 
(41
)
 
 
466

 
377

Product inventory and raw material
 
317

 
277

Inventoried costs, net
 
$
783

 
$
654