Basis Of Presentation (Details) - Program [Domain] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Basis of Presentation [Line Items]
Change in diluted earnings per share due to net unfavorable cumulative catch-up adjustments	$ (0.71)	$ (0.41)	$ (0.58)	$ (0.16)
Increase/(Decrease) in Earnings from operations due to change in accounting estimate	$ (724)	$ (312)		$ (145)

Changes in estimated revenues, cost of sales and the related effect on operating income are recognized using a cumulative catch-up adjustment which recognizes in the current period the cumulative effect of the changes on current and prior periods based on a contract’s percent complete

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration