Consolidated Statements of Changes in Shareholders' Equity (USD $) In Millions, except Per Share data	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
At beginning of year at Dec. 31, 2008		$ 327	$ 9,645	$ 5,469	$ (3,642)
Common stock repurchased		(23)	(1,098)
Employee stock awards and options exercised		3	110
Net earnings	1,686			1,686
Cash dividends declared				(539)
Other comprehensive (loss) income, net of tax	628				628
Cash dividends declared per share	$ 1.69
At end of year at Dec. 31, 2009	12,566	307	8,657	6,616	(3,014)
Common stock repurchased		(20)	(1,143)
Employee stock awards and options exercised		4	264
Net earnings	2,053			2,053
Cash dividends declared				(545)
Other comprehensive (loss) income, net of tax	257				257
Cash dividends declared per share	$ 1.84
At end of year at Dec. 31, 2010	13,436	291	7,778	8,124	(2,757)
Common stock repurchased		(40)	(2,264)
Employee stock awards and options exercised		3	263
Spin-off of Shipbuilding business			(1,877)		524
Net earnings	2,118			2,118
Cash dividends declared				(543)
Other comprehensive (loss) income, net of tax	(1,257)				(1,257)
Cash dividends declared per share	$ 1.97
At end of year at Dec. 31, 2011	$ 10,336	$ 254	$ 3,873	$ 9,699	$ (3,490)