Inventoried Costs, Net (Tables)

12 Months Ended

Dec. 31, 2015

Inventory Disclosure [Abstract]

Inventoried Costs

Inventoried costs consisted of the following:

	December 31
$ in millions	2015			2014
Production costs of contracts in process	$	1,218		$	1,257
General and administrative expenses	293			252
	1,511			1,509
Progress and performance-based payments received	(807		)	(873		)
	704			636
Product inventory	103			106
Total inventoried costs, net	$	807		$	742