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Receivables - Additional Information (Details) (USD $)
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Mar. 27, 2015
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Dec. 31, 2014
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Sep. 27, 2014
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|---|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Estimated unbilled contract receivables not expected to be collected within the next 12 months | $ 4,800,000 | ||
| Exelis indemnified receivable obligation | 10,281,000 | 11,411,000 | |
| Other accrued liabilities | Indemnified Receivable | |||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Exelis indemnified receivable obligation | $ 10,300,000 | $ 11,400,000 |