Inventoried Costs, Net (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Production costs of contracts in process	$ 1,342	$ 1,593
General and administrative expenses	259	262
Inventoried costs	1,601	1,855
Progress and performance-based payments received	(1,005)	(1,167)
Inventoried costs, net of progress payments	596	688
Product inventory	102	110
Total inventoried costs, net	$ 698	$ 798