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
Beginning of year at Dec. 31, 2009		$ 307	$ 8,657	$ 6,616	$ (3,014)
Common stock repurchased		(20)	(1,143)
Shares issued for stock awards and options		4	264
Other comprehensive (loss) income, net of tax	257				257
Spin-off of shipbuilding business			0		0
Net earnings	2,053			2,053
Dividends declared				(545)
Cash dividends declared per share	$ 1.84
End of year at Dec. 31, 2010		291	7,778	8,124	(2,757)
Common stock repurchased		(40)	(2,264)
Shares issued for stock awards and options		3	236
Other comprehensive (loss) income, net of tax	(1,257)				(1,257)
Spin-off of shipbuilding business			(1,877)		524
Net earnings	2,118			2,118
Dividends declared				(543)
Cash dividends declared per share	$ 1.97
End of year at Dec. 31, 2011	10,336	254	3,873	9,699	(3,490)
Common stock repurchased		(21)	(1,310)
Shares issued for stock awards and options		6	359
Other comprehensive (loss) income, net of tax	(1,297)				(1,297)
Spin-off of shipbuilding business			2		0
Net earnings	1,978			1,978
Dividends declared				(539)
Cash dividends declared per share	$ 2.15
End of year at Dec. 31, 2012	$ 9,514	$ 239	$ 2,924	$ 11,138	$ (4,787)