Costs and Estimated Earnings on Uncompleted Contracts (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Costs and Estimated Earnings on Uncompleted Contracts
Costs incurred on uncompleted contracts	$ 6,868	$ 6,676
Estimated earnings	4,743	4,665
Costs and estimated earnings on uncompleted contracts, Gross	11,611	11,341
Less: Billings to date	11,890	11,037
Total net estimate billing on uncompleted contracts	(279)	304
Costs and estimated earnings in excess of billings on uncompleted contracts	499	815
Billings in excess of costs and estimated earnings on uncompleted contracts	$ (778)	$ (511)

Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method.

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+ Details

- Definition

Total amount included in cost of uncompleted contracts in excess of related billings, or unbilled accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details

- Definition

Amount included in cost of uncompleted contracts in excess of related billings, or unbilled accounts receivable, which is expected to be collected within a year within one year (or one operating cycle, if longer) from the date of the balance sheet.

+ References+ Details