Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $) In Millions, except Per Share data	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
At beginning of period at Dec. 31, 2009		$ 307	$ 8,657	$ 6,737	$ (3,014)
Common stock repurchased		(18)	(1,026)
Employee stock awards and options		3	196
Net earnings	1,677			1,677
Dividends declared				(409)
Other comprehensive (loss) income, net of tax	84				84
Cash dividends declared per share	$ 1.37
At end of period at Sep. 30, 2010	13,194	292	7,827	8,005	(2,930)
At beginning of period at Dec. 31, 2010	13,557	291	7,778	8,245	(2,757)
Common stock repurchased		(28)	(1,626)
Employee stock awards and options		3	182
Spin-off of Shipbuilding business			(1,874)		524
Net earnings	1,570			1,570
Dividends declared				(414)
Other comprehensive (loss) income, net of tax	57				57
Cash dividends declared per share	$ 1.47
At end of period at Sep. 30, 2011	$ 11,951	$ 266	$ 4,460	$ 9,401	$ (2,176)