Accounts Receivable (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Accounts Receivable [Line Items]
Total accounts receivable	$ 4,452,000,000	$ 3,848,000,000
Receivables related to long-term production programs	2,100,000,000	1,600,000,000
Non-U.S. Government [Member]
Accounts Receivable [Line Items]
Total accounts receivable	2,536,000,000	2,013,000,000
U.S. Government [Member]
Accounts Receivable [Line Items]
Total accounts receivable	1,039,000,000	1,206,000,000
Commercial [Member]
Accounts Receivable [Line Items]
Total accounts receivable	$ 877,000,000	$ 629,000,000