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Costs and Estimated Earnings on Uncompleted Contracts | 12 Months Ended
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Dec. 31, 2012
Costs and Estimated Earnings on Uncompleted Contracts | 8. Costs and Estimated Earnings on Uncompleted Contracts Costs and estimated earnings on uncompleted contracts consist of (in millions):
|  | December 31, |
|  | 2012 |  |  | 2011 |
Costs incurred on uncompleted contracts |  | $ | 5,731 |  |  | $ | 5,839 |
Estimated earnings |  |  | 3,160 |  |  |  | 3,775 |
|  |  | 8,891 |  |  |  | 9,614 |
Less: Billings to date |  |  | 8,855 |  |  |  | 9,886 |
|  | $ | 36 |  |  | $ | (272 | )
Costs and estimated earnings in excess of billings on uncompleted contracts |  | $ | 1,225 |  |  | $ | 593 |
Billings in excess of costs and estimated earnings on uncompleted contracts |  |  | (1,189 | ) |  |  | (865 | )
|  | $ | 36 |  |  | $ | (272 | )

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- Definition Costs and estimated earnings on uncompleted contracts. + References No definition available. + Details
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