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Receivables - Schedule of Receivables (Details) (USD $)
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Dec. 31, 2014
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Dec. 31, 2013
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| Receivables [Abstract] |
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| Billed receivables |
$ 41,997,000 |
$ 68,508,000 |
| Unbilled contract receivables |
160,735,000 |
159,026,000 |
| Receivables |
202,732,000 |
227,534,000 |
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
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| Exelis indemnified receivable obligation |
11,411,000 |
0 |
| Estimated unbilled contract receivables related to requests for equitable adjustments and contract line item realignments |
4,800,000 |
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| Other accrued liabilities | Indemnified Receivable |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] |
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| Exelis indemnified receivable obligation |
$ 11,400,000 |
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