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		(15)	(861)
Employee stock awards and options		3	153
Net earnings	1,180			1,180
Dividends declared				(271)
Other comprehensive income, net of tax	27				27
Cash dividends declared per share	$ 0.90
At end of period at Jun. 30, 2010	12,903	295	7,949	7,646	(2,987)
At beginning of period at Dec. 31, 2010	13,557	291	7,778	8,245	(2,757)
Common stock repurchased		(16)	(991)
Employee stock awards and options		3	131
Spin-off of Shipbuilding business			(1,892)		524
Net earnings	1,050			1,050
Dividends declared				(277)
Other comprehensive income, net of tax	60				60
Cash dividends declared per share	$ 0.97
At end of period at Jun. 30, 2011	$ 12,149	$ 278	$ 5,026	$ 9,018	$ (2,173)