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Restructuring Charges (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Restructuring Cost and Reserve [Line Items] |  |  |
Severance charges | $ 0 | $ 99 | $ 102
Sikorsky Aircraft Corporation |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance payments |  | 40 |
Aeronautics |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance charges |  | $ 80 |
Rotary and Mission Systems & Information System and Global Solutions |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance charges |  |  | 82
RMS |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance charges |  |  | 67
Information Systems & Global Solutions |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance charges |  |  | $ 15

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- Definition The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are voluntarily and involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits. + References No definition available. + Details
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- Definition Cash outflows for payments of postemployment benefits (such as severance pay and health insurance benefits) recognized during the period. Postemployment benefits are benefits paid to employees after employment but before retirement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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