Business Dispositions (Details 1) (Unaudited) (USD $) In Millions	3 Months Ended	6 Months Ended			12 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Dec. 31, 2009 Advisory Services Division	Jun. 30, 2011 Shipbuilding Segment	Jun. 30, 2010 Shipbuilding Segment	Jun. 30, 2011 Shipbuilding Segment	Jun. 30, 2010 Shipbuilding Segment	Dec. 31, 2010 Shipbuilding Segment
Discontinued Operations Income Statement Disclosures (Table Amounts)
Sales and service revenues						$ 0	$ 1,596	$ 1,646	$ 3,314
Earnings (loss) from discontinued operations						0	(37)	59	46
Income tax benefit (expense)						0	8	(26)	(23)
Earnings (loss), net of tax						0	(29)	33	23
Gain on divestiture						0	0	2	11
Income tax expense						0	0	(1)	(4)
Gain on divestures, net of tax					15	0	0	1	7
Earnings (loss) from discontinued operations, net of tax	(29)	34	30			0	(29)	34	30
Assets
Current assets		7,814		13,801						1,315
Property, plant, and equipment, net		3,028		3,045						1,997
Goodwill		12,376		12,376						1,141
Other assets		1,086		1,076						759
Total assets of discontinued operations										5,212
Liabilities
Trade accounts payable		1,259		1,573						274
Other current liabilities		1,612		1,763						955
Total current liabilities		5,795		10,027						1,229
Long-term liabilities										1,563
Total liabilities of discontinued operations										$ 2,792