Inventoried Costs, Net (Tables)

12 Months Ended

Dec. 31, 2016

Inventory Disclosure [Abstract]

Inventoried Costs

Inventoried costs consisted of the following:

	December 31
$ in millions	2016			2015
Production costs of contracts in process	$	1,574		$	1,218
G&A expenses	249			293
	1,823			1,511
Progress and performance-based payments received	(1,107		)	(807		)
	716			704
Product inventory and raw material	100			103
Total inventoried costs, net	$	816		$	807