Inventoried Costs, Net (Tables)

12 Months Ended

Dec. 31, 2012

Inventory Disclosure [Abstract]

Inventoried Costs

Inventoried costs consisted of the following:

	December 31
$ in millions	2012			2011
Production costs of contracts in process		$1,593			$1,629
General and administrative expenses	262			221
	1,855			1,850
Progress payments received	(1,167		)	(1,100		)
	688			750
Product inventory	110			123
Total inventoried costs, net		$ 798			$ 873