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Legal Proceedings and Contingencies (Details) - Exelis - Passaic River Alaska $ in Millions |  | 6 Months Ended
--- | --- | ---
Mar. 31, 2016 party | Dec. 29, 2017 USD ($)
Loss Contingencies [Line Items] |  |
Estimated cost for all participating parties of EPA's preferred alternative | $ |  | $ 1,380
Number of over 100 potentially responsible parties notified | party | 100 |

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- Definition Best estimate of the loss exposure for reasonably possible environmental contingencies at an individual site for which no accrual has been recorded. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 10 -Subparagraph (c),(d)(2) -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859 + Details
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- Details
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