Business Dispositions (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Discontinued Operations Income Statement Disclosures (Table Amounts)
Earnings (loss) from discontinued operations, net of tax	$ 0	$ 0	$ 32
Shipbuilding Segment
Discontinued Operations Income Statement Disclosures (Table Amounts)
Sales			1,646
Earnings from discontinued operations			59
Income tax expense			(28)
Earnings, net of tax			31
Gain on divestitures, net of income tax expense of $1			1
Earnings (loss) from discontinued operations, net of tax			32
Discontinued Operations, Gain (Loss) on Disposal of Discontinued Operation, Tax			$ 1